Changeset 45457265 in mainline

Timestamp:

2018-02-03T02:14:26Z (7 years ago)

Author:

Jenda <jenda.jzqk73@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

eb862fd

Parents:

961a5ee

Message:

errno_t all the things!

Location:

uspace

Files:

• drv/bus/usb/xhci/bus.c (modified) (1 diff)
• drv/bus/usb/xhci/bus.h (modified) (1 diff)
• drv/bus/usb/xhci/commands.c (modified) (23 diffs)
• drv/bus/usb/xhci/commands.h (modified) (5 diffs)
• drv/bus/usb/xhci/device.c (modified) (8 diffs)
• drv/bus/usb/xhci/device.h (modified) (1 diff)
• drv/bus/usb/xhci/endpoint.c (modified) (8 diffs)
• drv/bus/usb/xhci/endpoint.h (modified) (2 diffs)
• drv/bus/usb/xhci/hc.c (modified) (29 diffs)
• drv/bus/usb/xhci/hc.h (modified) (2 diffs)
• drv/bus/usb/xhci/isoch.c (modified) (6 diffs)
• drv/bus/usb/xhci/isoch.h (modified) (2 diffs)
• drv/bus/usb/xhci/main.c (modified) (6 diffs)
• drv/bus/usb/xhci/rh.c (modified) (4 diffs)
• drv/bus/usb/xhci/rh.h (modified) (1 diff)
• drv/bus/usb/xhci/scratchpad.c (modified) (1 diff)
• drv/bus/usb/xhci/scratchpad.h (modified) (1 diff)
• drv/bus/usb/xhci/streams.c (modified) (13 diffs)
• drv/bus/usb/xhci/streams.h (modified) (1 diff)
• drv/bus/usb/xhci/transfers.c (modified) (9 diffs)
• drv/bus/usb/xhci/transfers.h (modified) (1 diff)
• drv/bus/usb/xhci/trb_ring.c (modified) (8 diffs)
• drv/bus/usb/xhci/trb_ring.h (modified) (3 diffs)
• lib/drv/generic/driver.c (modified) (1 diff)

uspace/drv/bus/usb/xhci/bus.c

@@ -68 +68 @@
  * @return Error code.
  */
-int xhci_bus_init(xhci_bus_t *bus, xhci_hc_t *hc)
+errno_t xhci_bus_init(xhci_bus_t *bus, xhci_hc_t *hc)
 {
         assert(bus);

uspace/drv/bus/usb/xhci/bus.h

@@ -52 +52 @@
 } xhci_bus_t;
 
-extern int xhci_bus_init(xhci_bus_t *, xhci_hc_t *);
+extern errno_t xhci_bus_init(xhci_bus_t *, xhci_hc_t *);
 extern void xhci_bus_fini(xhci_bus_t *);
 

uspace/drv/bus/usb/xhci/commands.c

@@ -72 +72 @@
  * reset before starting.
  */
-int xhci_init_commands(xhci_hc_t *hc)
+errno_t xhci_init_commands(xhci_hc_t *hc)
 {
         xhci_cmd_ring_t *cr = get_cmd_ring(hc);
-        int err;
+        errno_t err;
 
         if ((err = xhci_trb_ring_init(&cr->trb_ring, 0)))
@@ -172 +172 @@
 }
 
-static int wait_for_ring_open(xhci_cmd_ring_t *cr)
+static errno_t wait_for_ring_open(xhci_cmd_ring_t *cr)
 {
         assert(fibril_mutex_is_locked(&cr->guard));
@@ -194 +194 @@
  * Register the command as waiting for completion inside the command list.
  */
-static inline int enqueue_command(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static inline errno_t enqueue_command(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         xhci_cmd_ring_t *cr = get_cmd_ring(hc);
@@ -210 +210 @@
         list_append(&cmd->_header.link, &cr->cmd_list);
 
-        int err = EOK;
+        errno_t err = EOK;
         while (err == EOK) {
                 err = xhci_trb_ring_enqueue(&cr->trb_ring,
@@ -343 +343 @@
  * @param trb The COMMAND_COMPLETION TRB found in event ring.
  */
-int xhci_handle_command_completion(xhci_hc_t *hc, xhci_trb_t *trb)
+errno_t xhci_handle_command_completion(xhci_hc_t *hc, xhci_trb_t *trb)
 {
         xhci_cmd_ring_t *cr = get_cmd_ring(hc);
@@ -416 +416 @@
 /* Command-issuing functions */
 
-static int no_op_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t no_op_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -427 +427 @@
 }
 
-static int enable_slot_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t enable_slot_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -440 +440 @@
 }
 
-static int disable_slot_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t disable_slot_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -453 +453 @@
 }
 
-static int address_device_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t address_device_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -483 +483 @@
 }
 
-static int configure_endpoint_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t configure_endpoint_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -504 +504 @@
 }
 
-static int evaluate_context_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t evaluate_context_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -526 +526 @@
 }
 
-static int reset_endpoint_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t reset_endpoint_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -541 +541 @@
 }
 
-static int stop_endpoint_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t stop_endpoint_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -556 +556 @@
 }
 
-static int set_tr_dequeue_pointer_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t set_tr_dequeue_pointer_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -572 +572 @@
 }
 
-static int reset_device_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t reset_device_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -585 +585 @@
 }
 
-static int get_port_bandwidth_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
+static errno_t get_port_bandwidth_cmd(xhci_hc_t *hc, xhci_cmd_t *cmd)
 {
         assert(hc);
@@ -603 +603 @@
 /* The table of command-issuing functions. */
 
-typedef int (*cmd_handler) (xhci_hc_t *hc, xhci_cmd_t *cmd);
+typedef errno_t (*cmd_handler) (xhci_hc_t *hc, xhci_cmd_t *cmd);
 
 static cmd_handler cmd_handlers [] = {
@@ -635 +635 @@
  * COMMAND_ABORTED event.
  */
-static int try_abort_current_command(xhci_hc_t *hc)
+static errno_t try_abort_current_command(xhci_hc_t *hc)
 {
         xhci_cmd_ring_t *cr = get_cmd_ring(hc);
@@ -694 +694 @@
  * until COMMAND_COMPLETION event arrives.
  */
-static int wait_for_cmd_completion(xhci_hc_t *hc, xhci_cmd_t *cmd)
-{
-        int rv = EOK;
+static errno_t wait_for_cmd_completion(xhci_hc_t *hc, xhci_cmd_t *cmd)
+{
+        errno_t rv = EOK;
 
         if (fibril_get_id() == hc->event_handler) {
@@ -731 +731 @@
  * expires. Nothing is deallocated. Caller should always execute `xhci_cmd_fini`.
  */
-int xhci_cmd_sync(xhci_hc_t *hc, xhci_cmd_t *cmd)
-{
-        assert(hc);
-        assert(cmd);
-
-        int err;
+errno_t xhci_cmd_sync(xhci_hc_t *hc, xhci_cmd_t *cmd)
+{
+        assert(hc);
+        assert(cmd);
+
+        errno_t err;
 
         if (!cmd_handlers[cmd->_header.cmd]) {
@@ -773 +773 @@
  * is a useful shorthand for issuing commands without out parameters.
  */
-int xhci_cmd_sync_fini(xhci_hc_t *hc, xhci_cmd_t *cmd)
-{
-        const int err = xhci_cmd_sync(hc, cmd);
+errno_t xhci_cmd_sync_fini(xhci_hc_t *hc, xhci_cmd_t *cmd)
+{
+        const errno_t err = xhci_cmd_sync(hc, cmd);
         xhci_cmd_fini(cmd);
 
@@ -785 +785 @@
  * fibril. The command is copied to stack memory and `fini` is called upon its completion.
  */
-int xhci_cmd_async_fini(xhci_hc_t *hc, xhci_cmd_t *stack_cmd)
+errno_t xhci_cmd_async_fini(xhci_hc_t *hc, xhci_cmd_t *stack_cmd)
 {
         assert(hc);
@@ -801 +801 @@
 
         /* Issue the command. */
-        int err;
+        errno_t err;
 
         if (!cmd_handlers[heap_cmd->_header.cmd]) {

uspace/drv/bus/usb/xhci/commands.h

@@ -125 +125 @@
 
 /* Command handling control */
-extern int xhci_init_commands(xhci_hc_t *);
+extern errno_t xhci_init_commands(xhci_hc_t *);
 extern void xhci_fini_commands(xhci_hc_t *);
 
@@ -133 +133 @@
 extern void xhci_start_command_ring(xhci_hc_t *);
 
-extern int xhci_handle_command_completion(xhci_hc_t *, xhci_trb_t *);
+extern errno_t xhci_handle_command_completion(xhci_hc_t *, xhci_trb_t *);
 
 /* Command lifecycle */
@@ -140 +140 @@
 
 /* Issuing commands */
-extern int xhci_cmd_sync(xhci_hc_t *, xhci_cmd_t *);
-extern int xhci_cmd_sync_fini(xhci_hc_t *, xhci_cmd_t *);
-extern int xhci_cmd_async_fini(xhci_hc_t *, xhci_cmd_t *);
+extern errno_t xhci_cmd_sync(xhci_hc_t *, xhci_cmd_t *);
+extern errno_t xhci_cmd_sync_fini(xhci_hc_t *, xhci_cmd_t *);
+extern errno_t xhci_cmd_async_fini(xhci_hc_t *, xhci_cmd_t *);
 
-static inline int xhci_cmd_sync_inline_wrapper(xhci_hc_t *hc, xhci_cmd_t cmd)
+static inline errno_t xhci_cmd_sync_inline_wrapper(xhci_hc_t *hc, xhci_cmd_t cmd)
 {
         /* Poor man's xhci_cmd_init (everything else is zeroed) */
@@ -152 +152 @@
 
         /* Issue the command */
-        const int err = xhci_cmd_sync(hc, &cmd);
+        const errno_t err = xhci_cmd_sync(hc, &cmd);
         xhci_cmd_fini(&cmd);
 
@@ -166 +166 @@
  *
  *  Example:
- *    int err = xhci_cmd_sync_inline(hc, DISABLE_SLOT, .slot_id = 42);
+ *    errno_t err = xhci_cmd_sync_inline(hc, DISABLE_SLOT, .slot_id = 42);
  */
 

uspace/drv/bus/usb/xhci/device.c

@@ -72 +72 @@
  * @return Error code.
  */
-static int address_device(xhci_device_t *dev)
-{
-        int err;
+static errno_t address_device(xhci_device_t *dev)
+{
+        errno_t err;
 
         /* Enable new slot. */
@@ -115 +115 @@
  * @return Error code.
  */
-static int setup_ep0_packet_size(xhci_hc_t *hc, xhci_device_t *dev)
-{
-        int err;
+static errno_t setup_ep0_packet_size(xhci_hc_t *hc, xhci_device_t *dev)
+{
+        errno_t err;
 
         uint16_t max_packet_size;
@@ -144 +144 @@
  * Just the TT will not work correctly.
  */
-static int setup_hub(xhci_device_t *dev, usb_standard_device_descriptor_t *desc)
+static errno_t setup_hub(xhci_device_t *dev, usb_standard_device_descriptor_t *desc)
 {
         if (desc->device_class != USB_CLASS_HUB)
@@ -150 +150 @@
 
         usb_hub_descriptor_header_t hub_desc = { 0 };
-        const int err = hc_get_hub_desc(&dev->base, &hub_desc);
+        const errno_t err = hc_get_hub_desc(&dev->base, &hub_desc);
         if (err)
                 return err;
@@ -177 +177 @@
  * @return Error code.
  */
-int xhci_device_enumerate(device_t *dev)
-{
-        int err;
+errno_t xhci_device_enumerate(device_t *dev)
+{
+        errno_t err;
         xhci_bus_t *bus = bus_to_xhci_bus(dev->bus);
         xhci_device_t *xhci_dev = xhci_device_get(dev);
@@ -258 +258 @@
 void xhci_device_gone(device_t *dev)
 {
-        int err;
+        errno_t err;
         xhci_bus_t *bus = bus_to_xhci_bus(dev->bus);
         xhci_device_t *xhci_dev = xhci_device_get(dev);
@@ -277 +277 @@
  * Bus callback.
  */
-int xhci_device_online(device_t *dev_base)
-{
-        int err;
+errno_t xhci_device_online(device_t *dev_base)
+{
+        errno_t err;
 
         xhci_bus_t *bus = bus_to_xhci_bus(dev_base->bus);
@@ -305 +305 @@
 void xhci_device_offline(device_t *dev_base)
 {
-        int err;
+        errno_t err;
 
         xhci_bus_t *bus = bus_to_xhci_bus(dev_base->bus);

uspace/drv/bus/usb/xhci/device.h

@@ -65 +65 @@
 
 /* Bus callbacks */
-int xhci_device_enumerate(device_t *);
+errno_t xhci_device_enumerate(device_t *);
 void xhci_device_offline(device_t *);
-int xhci_device_online(device_t *);
+errno_t xhci_device_online(device_t *);
 void xhci_device_gone(device_t *);
 

uspace/drv/bus/usb/xhci/endpoint.c

@@ -48 +48 @@
 #include "streams.h"
 
-static int alloc_transfer_ds(xhci_endpoint_t *);
+static errno_t alloc_transfer_ds(xhci_endpoint_t *);
 
 /**
@@ -58 +58 @@
  * @return Error code.
  */
-static int xhci_endpoint_init(xhci_endpoint_t *xhci_ep, device_t *dev,
+static errno_t xhci_endpoint_init(xhci_endpoint_t *xhci_ep, device_t *dev,
     const usb_endpoint_descriptors_t *desc)
 {
-        int rc;
+        errno_t rc;
         assert(xhci_ep);
 
@@ -180 +180 @@
  * Bus callback.
  */
-int xhci_endpoint_register(endpoint_t *ep_base)
-{
-        int err;
+errno_t xhci_endpoint_register(endpoint_t *ep_base)
+{
+        errno_t err;
         xhci_endpoint_t *ep = xhci_endpoint_get(ep_base);
 
@@ -222 +222 @@
         usb_transfer_batch_t * const batch = ep->active_batch;
 
-        const int err = hc_stop_endpoint(xhci_ep);
+        const errno_t err = hc_stop_endpoint(xhci_ep);
         if (err) {
                 usb_log_error("Failed to stop endpoint %u of device "
@@ -245 +245 @@
 void xhci_endpoint_unregister(endpoint_t *ep_base)
 {
-        int err;
+        errno_t err;
         xhci_endpoint_t *ep = xhci_endpoint_get(ep_base);
         xhci_device_t *dev = xhci_device_get(ep_base->device);
@@ -300 +300 @@
  * @return Error code.
  */
-static int alloc_transfer_ds(xhci_endpoint_t *xhci_ep)
+static errno_t alloc_transfer_ds(xhci_endpoint_t *xhci_ep)
 {
         /* Can't use XHCI_EP_FMT because the endpoint may not have device. */
@@ -309 +309 @@
         xhci_ep->primary_stream_data_size = 0;
 
-        int err;
+        errno_t err;
         if ((err = xhci_trb_ring_init(&xhci_ep->ring, 0))) {
                 return err;
@@ -460 +460 @@
  * offending transfer.
  */
-int xhci_endpoint_clear_halt(xhci_endpoint_t *ep, uint32_t stream_id)
-{
-        int err;
+errno_t xhci_endpoint_clear_halt(xhci_endpoint_t *ep, uint32_t stream_id)
+{
+        errno_t err;
 
         if ((err = hc_reset_endpoint(ep)))

uspace/drv/bus/usb/xhci/endpoint.h

@@ -112 +112 @@
 
 extern endpoint_t *xhci_endpoint_create(device_t *, const usb_endpoint_descriptors_t *);
-extern int xhci_endpoint_register(endpoint_t *);
+extern errno_t xhci_endpoint_register(endpoint_t *);
 extern void xhci_endpoint_unregister(endpoint_t *);
 extern void xhci_endpoint_destroy(endpoint_t *);
@@ -120 +120 @@
 
 extern void xhci_setup_endpoint_context(xhci_endpoint_t *, xhci_ep_ctx_t *);
-extern int xhci_endpoint_clear_halt(xhci_endpoint_t *, unsigned);
+extern errno_t xhci_endpoint_clear_halt(xhci_endpoint_t *, unsigned);
 
 static inline xhci_endpoint_t * xhci_endpoint_get(endpoint_t *ep)

uspace/drv/bus/usb/xhci/hc.c

@@ -80 +80 @@
  * ports to protocol versions and speeds.
  */
-static int hc_parse_ec(xhci_hc_t *hc)
+static errno_t hc_parse_ec(xhci_hc_t *hc)
 {
         unsigned psic, major, minor;
@@ -186 +186 @@
  * Initialize MMIO spaces of xHC.
  */
-int hc_init_mmio(xhci_hc_t *hc, const hw_res_list_parsed_t *hw_res)
-{
-        int err;
+errno_t hc_init_mmio(xhci_hc_t *hc, const hw_res_list_parsed_t *hw_res)
+{
+        errno_t err;
 
         if (hw_res->mem_ranges.count != 1) {
@@ -257 +257 @@
  * Initialize structures kept in allocated memory.
  */
-int hc_init_memory(xhci_hc_t *hc, ddf_dev_t *device)
-{
-        int err = ENOMEM;
+errno_t hc_init_memory(xhci_hc_t *hc, ddf_dev_t *device)
+{
+        errno_t err = ENOMEM;
 
         if (dma_buffer_alloc(&hc->dcbaa_dma, (1 + hc->max_slots) * sizeof(uint64_t)))
@@ -362 +362 @@
  * (except 0) are disabled.
  */
-int hc_irq_code_gen(irq_code_t *code, xhci_hc_t *hc, const hw_res_list_parsed_t *hw_res, int *irq)
+errno_t hc_irq_code_gen(irq_code_t *code, xhci_hc_t *hc, const hw_res_list_parsed_t *hw_res, int *irq)
 {
         assert(code);
@@ -412 +412 @@
  * Claim xHC from BIOS. Implements handoff as per Section 4.22.1 of xHCI spec.
  */
-int hc_claim(xhci_hc_t *hc, ddf_dev_t *dev)
+errno_t hc_claim(xhci_hc_t *hc, ddf_dev_t *dev)
 {
         /* No legacy support capability, the controller is solely for us */
@@ -440 +440 @@
  * Ask the xHC to reset its state. Implements sequence
  */
-static int hc_reset(xhci_hc_t *hc)
+static errno_t hc_reset(xhci_hc_t *hc)
 {
         if (xhci_reg_wait(&hc->op_regs->usbsts, XHCI_REG_MASK(XHCI_OP_CNR), 0))
@@ -466 +466 @@
  * Initialize the HC: section 4.2
  */
-int hc_start(xhci_hc_t *hc)
-{
-        int err;
+errno_t hc_start(xhci_hc_t *hc)
+{
+        errno_t err;
 
         if ((err = hc_reset(hc)))
@@ -565 +565 @@
  * Used only when polling. Shall supplement the irq_commands.
  */
-int hc_status(bus_t *bus, uint32_t *status)
+errno_t hc_status(bus_t *bus, uint32_t *status)
 {
         xhci_hc_t *hc = bus_to_hc(bus);
@@ -583 +583 @@
 }
 
-static int xhci_handle_mfindex_wrap_event(xhci_hc_t *hc, xhci_trb_t *trb)
+static errno_t xhci_handle_mfindex_wrap_event(xhci_hc_t *hc, xhci_trb_t *trb)
 {
         struct timeval tv;
@@ -594 +594 @@
 }
 
-typedef int (*event_handler) (xhci_hc_t *, xhci_trb_t *trb);
+typedef errno_t (*event_handler) (xhci_hc_t *, xhci_trb_t *trb);
 
 /**
@@ -612 +612 @@
 };
 
-static int hc_handle_event(xhci_hc_t *hc, xhci_trb_t *trb)
+static errno_t hc_handle_event(xhci_hc_t *hc, xhci_trb_t *trb)
 {
         const unsigned type = TRB_TYPE(*trb);
@@ -630 +630 @@
 static int event_worker(void *arg)
 {
-        int err;
+        errno_t err;
         xhci_trb_t trb;
         xhci_hc_t * const hc = arg;
@@ -654 +654 @@
     xhci_interrupter_regs_t *intr)
 {
-        int err;
+        errno_t err;
 
         xhci_trb_t trb;
@@ -781 +781 @@
  * DCBAA with the newly created slot.
  */
-int hc_enable_slot(xhci_device_t *dev)
-{
-        int err;
+errno_t hc_enable_slot(xhci_device_t *dev)
+{
+        errno_t err;
         xhci_hc_t * const hc = bus_to_hc(dev->base.bus);
 
@@ -815 +815 @@
  * Frees the device context.
  */
-int hc_disable_slot(xhci_device_t *dev)
-{
-        int err;
+errno_t hc_disable_slot(xhci_device_t *dev)
+{
+        errno_t err;
         xhci_hc_t * const hc = bus_to_hc(dev->base.bus);
 
@@ -837 +837 @@
  * Prepare an empty Endpoint Input Context inside a dma buffer.
  */
-static int create_configure_ep_input_ctx(xhci_device_t *dev, dma_buffer_t *dma_buf)
+static errno_t create_configure_ep_input_ctx(xhci_device_t *dev, dma_buffer_t *dma_buf)
 {
         const xhci_hc_t * hc = bus_to_hc(dev->base.bus);
-        const int err = dma_buffer_alloc(dma_buf, XHCI_INPUT_CTX_SIZE(hc));
+        const errno_t err = dma_buffer_alloc(dma_buf, XHCI_INPUT_CTX_SIZE(hc));
         if (err)
                 return err;
@@ -860 +860 @@
  * @param dev Device to assing an address (unconfigured yet)
  */
-int hc_address_device(xhci_device_t *dev)
-{
-        int err = ENOMEM;
+errno_t hc_address_device(xhci_device_t *dev)
+{
+        errno_t err = ENOMEM;
         xhci_hc_t * const hc = bus_to_hc(dev->base.bus);
         xhci_endpoint_t *ep0 = xhci_endpoint_get(dev->base.endpoints[0]);
@@ -908 +908 @@
  * @param slot_id Slot ID assigned to the device.
  */
-int hc_configure_device(xhci_device_t *dev)
+errno_t hc_configure_device(xhci_device_t *dev)
 {
         xhci_hc_t * const hc = bus_to_hc(dev->base.bus);
@@ -914 +914 @@
         /* Issue configure endpoint command (sec 4.3.5). */
         dma_buffer_t ictx_dma_buf;
-        const int err = create_configure_ep_input_ctx(dev, &ictx_dma_buf);
+        const errno_t err = create_configure_ep_input_ctx(dev, &ictx_dma_buf);
         if (err)
                 return err;
@@ -929 +929 @@
  * @param dev The owner of the device
  */
-int hc_deconfigure_device(xhci_device_t *dev)
+errno_t hc_deconfigure_device(xhci_device_t *dev)
 {
         xhci_hc_t * const hc = bus_to_hc(dev->base.bus);
@@ -950 +950 @@
  * @param ep_ctx Endpoint context of the endpoint
  */
-int hc_add_endpoint(xhci_endpoint_t *ep)
+errno_t hc_add_endpoint(xhci_endpoint_t *ep)
 {
         xhci_device_t * const dev = xhci_ep_to_dev(ep);
@@ -957 +957 @@
         /* Issue configure endpoint command (sec 4.3.5). */
         dma_buffer_t ictx_dma_buf;
-        const int err = create_configure_ep_input_ctx(dev, &ictx_dma_buf);
+        const errno_t err = create_configure_ep_input_ctx(dev, &ictx_dma_buf);
         if (err)
                 return err;
@@ -981 +981 @@
  * @param ep_idx Endpoint DCI in question
  */
-int hc_drop_endpoint(xhci_endpoint_t *ep)
+errno_t hc_drop_endpoint(xhci_endpoint_t *ep)
 {
         xhci_device_t * const dev = xhci_ep_to_dev(ep);
@@ -992 +992 @@
         /* Issue configure endpoint command (sec 4.3.5). */
         dma_buffer_t ictx_dma_buf;
-        const int err = create_configure_ep_input_ctx(dev, &ictx_dma_buf);
+        const errno_t err = create_configure_ep_input_ctx(dev, &ictx_dma_buf);
         if (err)
                 return err;
@@ -1013 +1013 @@
  * @param ep_ctx Endpoint context of the endpoint
  */
-int hc_update_endpoint(xhci_endpoint_t *ep)
+errno_t hc_update_endpoint(xhci_endpoint_t *ep)
 {
         xhci_device_t * const dev = xhci_ep_to_dev(ep);
@@ -1021 +1021 @@
         xhci_hc_t * const hc = bus_to_hc(dev->base.bus);
 
-        const int err = dma_buffer_alloc(&ictx_dma_buf, XHCI_INPUT_CTX_SIZE(hc));
+        const errno_t err = dma_buffer_alloc(&ictx_dma_buf, XHCI_INPUT_CTX_SIZE(hc));
         if (err)
                 return err;
@@ -1044 +1044 @@
  * @param ep_idx Endpoint DCI in question
  */
-int hc_stop_endpoint(xhci_endpoint_t *ep)
+errno_t hc_stop_endpoint(xhci_endpoint_t *ep)
 {
         xhci_device_t * const dev = xhci_ep_to_dev(ep);
@@ -1065 +1065 @@
  * @param ep_idx Endpoint DCI in question
  */
-int hc_reset_endpoint(xhci_endpoint_t *ep)
+errno_t hc_reset_endpoint(xhci_endpoint_t *ep)
 {
         xhci_device_t * const dev = xhci_ep_to_dev(ep);
@@ -1081 +1081 @@
  * @param dev The owner of the endpoint
  */
-int hc_reset_ring(xhci_endpoint_t *ep, uint32_t stream_id)
+errno_t hc_reset_ring(xhci_endpoint_t *ep, uint32_t stream_id)
 {
         xhci_device_t * const dev = xhci_ep_to_dev(ep);

uspace/drv/bus/usb/xhci/hc.h

@@ -112 +112 @@
 typedef struct xhci_device xhci_device_t;
 
-extern int hc_init_mmio(xhci_hc_t *, const hw_res_list_parsed_t *);
-extern int hc_init_memory(xhci_hc_t *, ddf_dev_t *);
-extern int hc_claim(xhci_hc_t *, ddf_dev_t *);
-extern int hc_irq_code_gen(irq_code_t *, xhci_hc_t *, const hw_res_list_parsed_t *, int *);
-extern int hc_start(xhci_hc_t *);
+extern errno_t hc_init_mmio(xhci_hc_t *, const hw_res_list_parsed_t *);
+extern errno_t hc_init_memory(xhci_hc_t *, ddf_dev_t *);
+extern errno_t hc_claim(xhci_hc_t *, ddf_dev_t *);
+extern errno_t hc_irq_code_gen(irq_code_t *, xhci_hc_t *, const hw_res_list_parsed_t *, int *);
+extern errno_t hc_start(xhci_hc_t *);
 extern void hc_fini(xhci_hc_t *);
 
@@ -123 +123 @@
 extern unsigned hc_speed_to_psiv(usb_speed_t);
 
-extern int hc_enable_slot(xhci_device_t *);
-extern int hc_disable_slot(xhci_device_t *);
-extern int hc_address_device(xhci_device_t *);
-extern int hc_configure_device(xhci_device_t *);
-extern int hc_deconfigure_device(xhci_device_t *);
-extern int hc_add_endpoint(xhci_endpoint_t *);
-extern int hc_drop_endpoint(xhci_endpoint_t *);
-extern int hc_update_endpoint(xhci_endpoint_t *);
-extern int hc_stop_endpoint(xhci_endpoint_t *);
-extern int hc_reset_endpoint(xhci_endpoint_t *);
-extern int hc_reset_ring(xhci_endpoint_t *, uint32_t);
+extern errno_t hc_enable_slot(xhci_device_t *);
+extern errno_t hc_disable_slot(xhci_device_t *);
+extern errno_t hc_address_device(xhci_device_t *);
+extern errno_t hc_configure_device(xhci_device_t *);
+extern errno_t hc_deconfigure_device(xhci_device_t *);
+extern errno_t hc_add_endpoint(xhci_endpoint_t *);
+extern errno_t hc_drop_endpoint(xhci_endpoint_t *);
+extern errno_t hc_update_endpoint(xhci_endpoint_t *);
+extern errno_t hc_stop_endpoint(xhci_endpoint_t *);
+extern errno_t hc_reset_endpoint(xhci_endpoint_t *);
+extern errno_t hc_reset_ring(xhci_endpoint_t *, uint32_t);
 
-extern int hc_status(bus_t *, uint32_t *);
+extern errno_t hc_status(bus_t *, uint32_t *);
 extern void hc_interrupt(bus_t *, uint32_t);
 

uspace/drv/bus/usb/xhci/isoch.c

@@ -141 +141 @@
  * Allocate isochronous buffers. Create the feeding timer.
  */
-int isoch_alloc_transfers(xhci_endpoint_t *ep) {
+errno_t isoch_alloc_transfers(xhci_endpoint_t *ep) {
         assert(ep->base.transfer_type == USB_TRANSFER_ISOCHRONOUS);
         xhci_isoch_t * const isoch = ep->isoch;
@@ -171 +171 @@
 }
 
-static int schedule_isochronous_trb(xhci_endpoint_t *ep, xhci_isoch_transfer_t *it)
+static errno_t schedule_isochronous_trb(xhci_endpoint_t *ep, xhci_isoch_transfer_t *it)
 {
         xhci_trb_t trb;
@@ -193 +193 @@
         TRB_ISOCH_SET_FRAMEID(trb, (it->mfindex / 8) % 2048);
 
-        const int err = xhci_trb_ring_enqueue(&ep->ring, &trb, &it->interrupt_trb_phys);
+        const errno_t err = xhci_trb_ring_enqueue(&ep->ring, &trb, &it->interrupt_trb_phys);
         return err;
 }
@@ -472 +472 @@
  * it to the xHC.
  */
-int isoch_schedule_out(xhci_transfer_t *transfer)
-{
-        int err = EOK;
+errno_t isoch_schedule_out(xhci_transfer_t *transfer)
+{
+        errno_t err = EOK;
 
         xhci_endpoint_t *ep = xhci_endpoint_get(transfer->batch.ep);
@@ -540 +540 @@
  * buffers, and fetch one filled buffer from the ring.
  */
-int isoch_schedule_in(xhci_transfer_t *transfer)
+errno_t isoch_schedule_in(xhci_transfer_t *transfer)
 {
         xhci_endpoint_t *ep = xhci_endpoint_get(transfer->batch.ep);
@@ -595 +595 @@
         fibril_mutex_lock(&ep->isoch->guard);
 
-        int err;
+        errno_t err;
         const xhci_trb_completion_code_t completion_code = TRB_COMPLETION_CODE(*trb);
 

uspace/drv/bus/usb/xhci/isoch.h

@@ -68 +68 @@
 
         /** Result of the transfer. Valid only if status == ISOCH_COMPLETE. */
-        int error;
+        errno_t error;
 } xhci_isoch_transfer_t;
 
@@ -119 +119 @@
 extern void isoch_init(xhci_endpoint_t *, const usb_endpoint_descriptors_t *);
 extern void isoch_fini(xhci_endpoint_t *);
-extern int isoch_alloc_transfers(xhci_endpoint_t *);
+extern errno_t isoch_alloc_transfers(xhci_endpoint_t *);
 
-extern int isoch_schedule_out(xhci_transfer_t *);
-extern int isoch_schedule_in(xhci_transfer_t *);
+extern errno_t isoch_schedule_out(xhci_transfer_t *);
+extern errno_t isoch_schedule_in(xhci_transfer_t *);
 extern void isoch_handle_transfer_event(xhci_hc_t *, xhci_endpoint_t *, xhci_trb_t *);
 

uspace/drv/bus/usb/xhci/main.c

@@ -53 +53 @@
 }
 
-static int hcd_hc_add(hc_device_t *hcd, const hw_res_list_parsed_t *hw_res)
+static errno_t hcd_hc_add(hc_device_t *hcd, const hw_res_list_parsed_t *hw_res)
 {
-        int err;
+        errno_t err;
         xhci_hc_t *hc = hcd_to_hc(hcd);
         hc_device_setup(hcd, (bus_t *) &hc->bus);
@@ -68 +68 @@
 }
 
-static int hcd_irq_code_gen(irq_code_t *code, hc_device_t *hcd, const hw_res_list_parsed_t *hw_res, int *irq)
+static errno_t hcd_irq_code_gen(irq_code_t *code, hc_device_t *hcd, const hw_res_list_parsed_t *hw_res, int *irq)
 {
         xhci_hc_t *hc = hcd_to_hc(hcd);
@@ -74 +74 @@
 }
 
-static int hcd_claim(hc_device_t *hcd)
+static errno_t hcd_claim(hc_device_t *hcd)
 {
         xhci_hc_t *hc = hcd_to_hc(hcd);
@@ -80 +80 @@
 }
 
-static int hcd_start(hc_device_t *hcd)
+static errno_t hcd_start(hc_device_t *hcd)
 {
         xhci_hc_t *hc = hcd_to_hc(hcd);
@@ -86 +86 @@
 }
 
-static int hcd_hc_gone(hc_device_t *hcd)
+static errno_t hcd_hc_gone(hc_device_t *hcd)
 {
         xhci_hc_t *hc = hcd_to_hc(hcd);
@@ -112 +112 @@
  * Driver debug level is set here.
  */
-int main(int argc, char *argv[])
+errno_t main(int argc, char *argv[])
 {
         log_init(NAME);

uspace/drv/bus/usb/xhci/rh.c

@@ -79 +79 @@
  * Initialize the roothub subsystem.
  */
-int xhci_rh_init(xhci_rh_t *rh, xhci_hc_t *hc)
+errno_t xhci_rh_init(xhci_rh_t *rh, xhci_hc_t *hc)
 {
         assert(rh);
@@ -90 +90 @@
                 return ENOMEM;
 
-        const int err = bus_device_init(&rh->device.base, &rh->hc->bus.base);
+        const errno_t err = bus_device_init(&rh->device.base, &rh->hc->bus.base);
         if (err) {
                 free(rh->ports);
@@ -119 +119 @@
  * Finalize the RH subsystem.
  */
-int xhci_rh_fini(xhci_rh_t *rh)
+errno_t xhci_rh_fini(xhci_rh_t *rh)
 {
         assert(rh);
@@ -139 +139 @@
  * a virtual usbhub device for RH, this routine is called for devices directly.
  */
-static int rh_enumerate_device(usb_port_t *usb_port)
-{
-        int err;
+static errno_t rh_enumerate_device(usb_port_t *usb_port)
+{
+        errno_t err;
         rh_port_t *port = get_rh_port(usb_port);
 

uspace/drv/bus/usb/xhci/rh.h

@@ -81 +81 @@
 } xhci_rh_t;
 
-extern int xhci_rh_init(xhci_rh_t *, xhci_hc_t *);
-extern int xhci_rh_fini(xhci_rh_t *);
+extern errno_t xhci_rh_init(xhci_rh_t *, xhci_hc_t *);
+extern errno_t xhci_rh_fini(xhci_rh_t *);
 
 extern void xhci_rh_set_ports_protocol(xhci_rh_t *, unsigned, unsigned, unsigned);

uspace/drv/bus/usb/xhci/scratchpad.c

@@ -57 +57 @@
  * Allocate all scratchpad buffers, and configure the xHC.
  */
-int xhci_scratchpad_alloc(xhci_hc_t *hc)
+errno_t xhci_scratchpad_alloc(xhci_hc_t *hc)
 {
         const unsigned num_bufs = xhci_scratchpad_count(hc);

uspace/drv/bus/usb/xhci/scratchpad.h

@@ -45 +45 @@
 typedef struct xhci_hc xhci_hc_t;
 
-extern int xhci_scratchpad_alloc(xhci_hc_t *);
+extern errno_t xhci_scratchpad_alloc(xhci_hc_t *);
 extern void xhci_scratchpad_free(xhci_hc_t *);
 

uspace/drv/bus/usb/xhci/streams.c

@@ -85 +85 @@
  * @param[in] count Amount of primary streams.
  */
-static int initialize_primary_structures(xhci_endpoint_t *xhci_ep, unsigned count)
+static errno_t initialize_primary_structures(xhci_endpoint_t *xhci_ep, unsigned count)
 {
         usb_log_debug("Allocating primary stream context array of size %u "
@@ -152 +152 @@
  * @param[in] index index of the initialized stream structure.
  */
-static int initialize_primary_stream(xhci_hc_t *hc, xhci_endpoint_t *xhci_ep,
-    unsigned index)
+static errno_t initialize_primary_stream(xhci_hc_t *hc, xhci_endpoint_t *xhci_ep,
+        unsigned index)
 {
         xhci_stream_ctx_t *ctx = &xhci_ep->primary_stream_ctx_array[index];
@@ -159 +159 @@
         memset(data, 0, sizeof(xhci_stream_data_t));
 
-        int err = EOK;
+        errno_t err = EOK;
 
         /* Init and register TRB ring for the primary stream */
@@ -178 +178 @@
  * @param[in] xhci_ep XHCI bulk endpoint to use.
  */
-static int initialize_primary_streams(xhci_hc_t *hc, xhci_endpoint_t *xhci_ep)
-{
-        int err = EOK;
+static errno_t initialize_primary_streams(xhci_hc_t *hc, xhci_endpoint_t *xhci_ep)
+{
+        errno_t err = EOK;
         size_t index;
         for (index = 0; index < xhci_ep->primary_stream_data_size; ++index) {
@@ -205 +205 @@
  * @param[in] count Number of secondary streams to initialize.
  */
-static int initialize_secondary_streams(xhci_hc_t *hc, xhci_endpoint_t *xhci_ep,
-    unsigned idx, unsigned count)
+static errno_t initialize_secondary_streams(xhci_hc_t *hc, xhci_endpoint_t *xhci_ep,
+        unsigned idx, unsigned count)
 {
         if (count == 0) {
@@ -243 +243 @@
 
         /* Initialize all the rings. */
-        int err = EOK;
+        errno_t err = EOK;
         size_t index;
         for (index = 0; index < count; ++index) {
@@ -275 +275 @@
  */
 static void setup_stream_context(xhci_endpoint_t *xhci_ep, xhci_ep_ctx_t *ctx,
-    unsigned pstreams, unsigned lsa)
+        unsigned pstreams, unsigned lsa)
 {
         XHCI_EP_TYPE_SET(*ctx, xhci_endpoint_type(xhci_ep));
@@ -294 +294 @@
  * @param[in] count Amount of primary streams requested.
  */
-static int verify_stream_conditions(xhci_hc_t *hc, xhci_device_t *dev,
+static errno_t verify_stream_conditions(xhci_hc_t *hc, xhci_device_t *dev,
         xhci_endpoint_t *xhci_ep, unsigned count)
 {
@@ -345 +345 @@
  * @param[in] xhci_ep Associated XHCI bulk endpoint.
  */
-int xhci_endpoint_remove_streams(xhci_hc_t *hc, xhci_device_t *dev,
-    xhci_endpoint_t *xhci_ep)
+errno_t xhci_endpoint_remove_streams(xhci_hc_t *hc, xhci_device_t *dev,
+        xhci_endpoint_t *xhci_ep)
 {
         if (!xhci_ep->primary_stream_data_size) {
@@ -357 +357 @@
 
         /* Streams are now removed, proceed with reconfiguring endpoint. */
-        int err;
+        errno_t err;
         if ((err = xhci_trb_ring_init(&xhci_ep->ring, 0))) {
                 usb_log_error("Failed to initialize a transfer ring.");
@@ -373 +373 @@
  * @param[in] count Amount of primary streams requested.
  */
-int xhci_endpoint_request_primary_streams(xhci_hc_t *hc, xhci_device_t *dev,
+errno_t xhci_endpoint_request_primary_streams(xhci_hc_t *hc, xhci_device_t *dev,
         xhci_endpoint_t *xhci_ep, unsigned count)
 {
-        int err = verify_stream_conditions(hc, dev, xhci_ep, count);
+        errno_t err = verify_stream_conditions(hc, dev, xhci_ep, count);
         if (err) {
                 return err;
@@ -421 +421 @@
  * @param[in] count Amount of primary streams requested.
  */
-int xhci_endpoint_request_secondary_streams(xhci_hc_t *hc, xhci_device_t *dev,
+errno_t xhci_endpoint_request_secondary_streams(xhci_hc_t *hc, xhci_device_t *dev,
         xhci_endpoint_t *xhci_ep, unsigned *sizes, unsigned count)
 {
@@ -430 +430 @@
         }
 
-        int err = verify_stream_conditions(hc, dev, xhci_ep, count);
+        errno_t err = verify_stream_conditions(hc, dev, xhci_ep, count);
         if (err) {
                 return err;

uspace/drv/bus/usb/xhci/streams.h

@@ -64 +64 @@
 extern void xhci_stream_free_ds(xhci_endpoint_t *xhci_ep);
 
-extern int xhci_endpoint_remove_streams(xhci_hc_t *hc, xhci_device_t *dev, xhci_endpoint_t *xhci_ep);
-extern int xhci_endpoint_request_primary_streams(xhci_hc_t *hc, xhci_device_t *dev,
+extern errno_t xhci_endpoint_remove_streams(xhci_hc_t *hc, xhci_device_t *dev, xhci_endpoint_t *xhci_ep);
+extern errno_t xhci_endpoint_request_primary_streams(xhci_hc_t *hc, xhci_device_t *dev,
         xhci_endpoint_t *xhci_ep, unsigned count);
-extern int xhci_endpoint_request_secondary_streams(xhci_hc_t *hc, xhci_device_t *dev,
+extern errno_t xhci_endpoint_request_secondary_streams(xhci_hc_t *hc, xhci_device_t *dev,
         xhci_endpoint_t *xhci_ep, unsigned *sizes, unsigned count);
 

uspace/drv/bus/usb/xhci/transfers.c

@@ -150 +150 @@
 }
 
-static int schedule_control(xhci_hc_t* hc, xhci_transfer_t* transfer)
+static errno_t schedule_control(xhci_hc_t* hc, xhci_transfer_t* transfer)
 {
         usb_transfer_batch_t *batch = &transfer->batch;
@@ -213 +213 @@
         // Issue a Configure Endpoint command, if needed.
         if (configure_endpoint_needed(setup)) {
-                const int err = hc_configure_device(xhci_ep_to_dev(xhci_ep));
+                const errno_t err = hc_configure_device(xhci_ep_to_dev(xhci_ep));
                 if (err)
                         return err;
@@ -222 +222 @@
 }
 
-static int schedule_bulk(xhci_hc_t* hc, xhci_transfer_t *transfer)
+static errno_t schedule_bulk(xhci_hc_t* hc, xhci_transfer_t *transfer)
 {
         /* The stream-enabled endpoints need to chain ED trb */
@@ -276 +276 @@
 }
 
-static int schedule_interrupt(xhci_hc_t* hc, xhci_transfer_t* transfer)
+static errno_t schedule_interrupt(xhci_hc_t* hc, xhci_transfer_t* transfer)
 {
         const size_t buffer_count = calculate_trb_count(transfer);
@@ -309 +309 @@
 }
 
-int xhci_handle_transfer_event(xhci_hc_t* hc, xhci_trb_t* trb)
+errno_t xhci_handle_transfer_event(xhci_hc_t* hc, xhci_trb_t* trb)
 {
         uintptr_t addr = trb->parameter;
@@ -430 +430 @@
 }
 
-typedef int (*transfer_handler)(xhci_hc_t *, xhci_transfer_t *);
+typedef errno_t (*transfer_handler)(xhci_hc_t *, xhci_transfer_t *);
 
 static const transfer_handler transfer_handlers[] = {
@@ -444 +444 @@
  * Bus callback.
  */
-int xhci_transfer_schedule(usb_transfer_batch_t *batch)
+errno_t xhci_transfer_schedule(usb_transfer_batch_t *batch)
 {
         endpoint_t *ep = batch->ep;
@@ -504 +504 @@
                                  * possible that we have to clear all of them.
                                  */
-                                const int err = xhci_endpoint_clear_halt(xhci_endpoint_get(halted_ep), 0);
+                                const errno_t err = xhci_endpoint_clear_halt(xhci_endpoint_get(halted_ep), 0);
                                 endpoint_del_ref(halted_ep);
                                 if (err) {
@@ -526 +526 @@
 
 
-        int err;
+        errno_t err;
         fibril_mutex_lock(&xhci_ep->guard);
 

uspace/drv/bus/usb/xhci/transfers.h

@@ -56 +56 @@
 
 extern usb_transfer_batch_t* xhci_transfer_create(endpoint_t *);
-extern int xhci_transfer_schedule(usb_transfer_batch_t *);
+extern errno_t xhci_transfer_schedule(usb_transfer_batch_t *);
 
-extern int xhci_handle_transfer_event(xhci_hc_t *, xhci_trb_t *);
+extern errno_t xhci_handle_transfer_event(xhci_hc_t *, xhci_trb_t *);
 extern void xhci_transfer_destroy(usb_transfer_batch_t *);
 

uspace/drv/bus/usb/xhci/trb_ring.c

@@ -87 +87 @@
  * to DMAMEM_4GiB.
  */
-static int trb_segment_alloc(trb_segment_t **segment)
+static errno_t trb_segment_alloc(trb_segment_t **segment)
 {
         dma_buffer_t dbuf;
 
-        const int err = dma_buffer_alloc(&dbuf, PAGE_SIZE);
+        const errno_t err = dma_buffer_alloc(&dbuf, PAGE_SIZE);
         if (err)
                 return err;
@@ -114 +114 @@
  * choice on a reasonable default (one page-sized segment).
  */
-int xhci_trb_ring_init(xhci_trb_ring_t *ring, size_t initial_size)
-{
-        int err;
+errno_t xhci_trb_ring_init(xhci_trb_ring_t *ring, size_t initial_size)
+{
+        errno_t err;
         if (initial_size == 0)
                 initial_size = SEGMENT_TRB_USEFUL_COUNT;
@@ -218 +218 @@
  *         EAGAIN when the ring is too full to fit all TRBs (temporary)
  */
-int xhci_trb_ring_enqueue_multiple(xhci_trb_ring_t *ring, xhci_trb_t *first_trb,
+errno_t xhci_trb_ring_enqueue_multiple(xhci_trb_ring_t *ring, xhci_trb_t *first_trb,
         size_t trbs, uintptr_t *phys)
 {
-        int err;
+        errno_t err;
         assert(trbs > 0);
         fibril_mutex_lock(&ring->guard);
@@ -294 +294 @@
  * Enqueue TD composed of a single TRB. See: `xhci_trb_ring_enqueue_multiple`
  */
-int xhci_trb_ring_enqueue(xhci_trb_ring_t *ring, xhci_trb_t *td, uintptr_t *phys)
+errno_t xhci_trb_ring_enqueue(xhci_trb_ring_t *ring, xhci_trb_t *td, uintptr_t *phys)
 {
         return xhci_trb_ring_enqueue_multiple(ring, td, 1, phys);
@@ -315 +315 @@
  * choice on a reasonable default (one page-sized segment).
  */
-int xhci_event_ring_init(xhci_event_ring_t *ring, size_t initial_size)
-{
-        int err;
+errno_t xhci_event_ring_init(xhci_event_ring_t *ring, size_t initial_size)
+{
+        errno_t err;
         if (initial_size == 0)
                 initial_size = SEGMENT_TRB_COUNT;
@@ -390 +390 @@
  *         ENOENT when the ring is empty
  */
-int xhci_event_ring_dequeue(xhci_event_ring_t *ring, xhci_trb_t *event)
+errno_t xhci_event_ring_dequeue(xhci_event_ring_t *ring, xhci_trb_t *event)
 {
         fibril_mutex_lock(&ring->guard);
@@ -445 +445 @@
 }
 
-int xhci_sw_ring_enqueue(xhci_sw_ring_t *ring, xhci_trb_t *trb)
+errno_t xhci_sw_ring_enqueue(xhci_sw_ring_t *ring, xhci_trb_t *trb)
 {
         assert(ring);
@@ -464 +464 @@
 }
 
-int xhci_sw_ring_dequeue(xhci_sw_ring_t *ring, xhci_trb_t *trb)
+errno_t xhci_sw_ring_dequeue(xhci_sw_ring_t *ring, xhci_trb_t *trb)
 {
         assert(ring);

uspace/drv/bus/usb/xhci/trb_ring.h

@@ -74 +74 @@
 } xhci_trb_ring_t;
 
-extern int xhci_trb_ring_init(xhci_trb_ring_t *, size_t);
+extern errno_t xhci_trb_ring_init(xhci_trb_ring_t *, size_t);
 extern void xhci_trb_ring_fini(xhci_trb_ring_t *);
-extern int xhci_trb_ring_enqueue(xhci_trb_ring_t *, xhci_trb_t *, uintptr_t *);
-extern int xhci_trb_ring_enqueue_multiple(xhci_trb_ring_t *, xhci_trb_t *, size_t, uintptr_t *);
+extern errno_t xhci_trb_ring_enqueue(xhci_trb_ring_t *, xhci_trb_t *, uintptr_t *);
+extern errno_t xhci_trb_ring_enqueue_multiple(xhci_trb_ring_t *, xhci_trb_t *, size_t, uintptr_t *);
 
 extern void xhci_trb_ring_reset_dequeue_state(xhci_trb_ring_t *ring, uintptr_t *addr);
@@ -107 +107 @@
 } xhci_event_ring_t;
 
-extern int xhci_event_ring_init(xhci_event_ring_t *, size_t);
+extern errno_t xhci_event_ring_init(xhci_event_ring_t *, size_t);
 extern void xhci_event_ring_fini(xhci_event_ring_t *);
 extern void xhci_event_ring_reset(xhci_event_ring_t *);
-extern int xhci_event_ring_dequeue(xhci_event_ring_t *, xhci_trb_t *);
+extern errno_t xhci_event_ring_dequeue(xhci_event_ring_t *, xhci_trb_t *);
 
 /**
@@ -128 +128 @@
 
 /* Both may block if the ring is full/empty. */
-extern int xhci_sw_ring_enqueue(xhci_sw_ring_t *, xhci_trb_t *);
-extern int xhci_sw_ring_dequeue(xhci_sw_ring_t *, xhci_trb_t *);
+extern errno_t xhci_sw_ring_enqueue(xhci_sw_ring_t *, xhci_trb_t *);
+extern errno_t xhci_sw_ring_dequeue(xhci_sw_ring_t *, xhci_trb_t *);
 
 extern void xhci_sw_ring_restart(xhci_sw_ring_t *);

uspace/lib/drv/generic/driver.c

@@ -971 +971 @@
 }
 
-int ddf_driver_main(const driver_t *drv)
+errno_t ddf_driver_main(const driver_t *drv)
 {
         /*