Changes in uspace/drv/usbmid/explore.c [d70e0a3c:d3880aa] in mainline

File:

• uspace/drv/usbmid/explore.c (modified) (2 diffs)

uspace/drv/usbmid/explore.c

@@ -42 +42 @@
 #include "usbmid.h"
 
+/** Allocate and retrieve full configuration descriptor.
+ *
+ * @param[in] dev USB device.
+ * @param[in] config_index Configuration index.
+ * @param[out] size Pointer where to store size of the allocated buffer.
+ * @return Allocated full configuration descriptor.
+ * @retval NULL Error occured.
+ */
+static void *get_configuration_descriptor(usbmid_device_t *dev,
+    size_t config_index, size_t *size)
+{
+        usb_standard_configuration_descriptor_t config_descriptor;
+        int rc = usb_request_get_bare_configuration_descriptor(&dev->ctrl_pipe,
+            config_index, &config_descriptor);
+        if (rc != EOK) {
+                usb_log_error("Failed getting configuration descriptor: %s.\n",
+                    str_error(rc));
+                return NULL;
+        }
+
+        void *full_config_descriptor = malloc(config_descriptor.total_length);
+        if (full_config_descriptor == NULL) {
+                usb_log_fatal("Out of memory (wanted: %zuB).\n",
+                    (size_t) config_descriptor.total_length);
+                return NULL;
+        }
+
+        size_t full_config_descriptor_size;
+        rc = usb_request_get_full_configuration_descriptor(&dev->ctrl_pipe,
+            config_index,
+            full_config_descriptor, config_descriptor.total_length,
+            &full_config_descriptor_size);
+        if (rc != EOK) {
+                usb_log_error("Failed getting configuration descriptor: %s.\n",
+                    str_error(rc));
+                free(full_config_descriptor);
+                return NULL;
+        }
+
+        if (full_config_descriptor_size != config_descriptor.total_length) {
+                usb_log_error("Failed getting full configuration descriptor.\n");
+                free(full_config_descriptor);
+                return NULL;
+        }
+
+        if (size != NULL) {
+                *size = full_config_descriptor_size;
+        }
+
+        return full_config_descriptor;
+}
+
 /** Find starting indexes of all interface descriptors in a configuration.
  *
@@ -126 +178 @@
 
         size_t config_descriptor_size;
-        uint8_t *config_descriptor_raw = NULL;
-        rc = usb_request_get_full_configuration_descriptor_alloc(
-            &dev->ctrl_pipe, 0,
-            (void **) &config_descriptor_raw, &config_descriptor_size);
-        if (rc != EOK) {
-                usb_log_error("Failed getting full config descriptor: %s.\n",
-                    str_error(rc));
+        uint8_t *config_descriptor_raw = get_configuration_descriptor(dev, 0,
+            &config_descriptor_size);
+        if (config_descriptor_raw == NULL) {
                 return false;
         }