Commit 26186e5f authored Apr 28, 2016 by Chunfeng Yun Committed by Greg Kroah-Hartman Apr 28, 2016

usb: misc: usbtest: fix error of urb allocation



urb allocation will fail when usbtest_alloc_urb() tries to
allocate zero length buffer, but it doesn't need it in fact,
so just skips buffer allocation in the case.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent f5e6253f

drivers/usb/misc/usbtest.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -287,6 +287,9 @@ static struct urb *usbtest_alloc_urb(
		if (usb_pipein(pipe))
		urb->transfer_flags \|= URB_SHORT_NOT_OK;

		if ((bytes + offset) == 0)
		return urb;

		if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
		urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset,
		GFP_KERNEL, &urb->transfer_dma);