Changes in kernel/generic/src/ddi/ddi.c [9d58539:2c0b348] in mainline

File:

• kernel/generic/src/ddi/ddi.c (modified) (2 diffs)

kernel/generic/src/ddi/ddi.c

@@ -336 +336 @@
                 order = fnzb(pages - 1) + 1;
         
-        *phys = frame_alloc_noreserve(order, 0);
+        *phys = frame_alloc_noreserve(order, FRAME_DMA);
         if (*phys == NULL)
                 return ENOMEM;
@@ -361 +361 @@
 NO_TRACE static int dmamem_unmap_anonymous(uintptr_t virt)
 {
-        // TODO: implement unlocking & unmap
-        return EOK;
+        // TODO: This is an ugly hack
+        as_t *as = TASK->as;
+
+        mutex_lock(&as->lock);
+        as_area_t *area = find_locked_area(as, virt);
+        if (!area) {
+                mutex_unlock(&as->lock);
+                return ENOENT;
+        }
+        frame_free_noreserve(area->backend_data.base);
+        area->backend_data.base = 0;
+        area->backend_data.frames = 0;
+        mutex_unlock(&area->lock);
+        mutex_unlock(&as->lock);
+
+        return as_area_destroy(as, virt);
 }