usb: core: Remove redundant vmap checks (b3d53f5f) · Commits · 戴 / test

Now that the vmap area checks are being performed in the DMA infrastructure directly, there is no need to repeat them in USB. Signed-off-by:

drivers/usb/core/hcd.c

+1 −7

Original line number	Diff line number	Diff line
		@@ -1410,10 +1410,7 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd hcd, struct urb urb,
		if (hcd->self.uses_pio_for_control)
		return ret;
		if (hcd_uses_dma(hcd)) {
		if (is_vmalloc_addr(urb->setup_packet)) {
		WARN_ONCE(1, "setup packet is not dma capable\n");
		return -EAGAIN;
		} else if (object_is_on_stack(urb->setup_packet)) {
		if (object_is_on_stack(urb->setup_packet)) {
		WARN_ONCE(1, "setup packet is on stack\n");
		return -EAGAIN;
		}
		@@ -1479,9 +1476,6 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd hcd, struct urb urb,
		ret = -EAGAIN;
		else
		urb->transfer_flags \|= URB_DMA_MAP_PAGE;
		} else if (is_vmalloc_addr(urb->transfer_buffer)) {
		WARN_ONCE(1, "transfer buffer not dma capable\n");
		ret = -EAGAIN;
		} else if (object_is_on_stack(urb->transfer_buffer)) {
		WARN_ONCE(1, "transfer buffer is on stack\n");
		ret = -EAGAIN;