From 26186e5f2c1a6d1c244a3052f02e46ae29d823f2 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Thu, 28 Apr 2016 11:42:21 +0800 Subject: 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/usbtest.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c index 92fdb6e9faff..de485d8a5beb 100644 --- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -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); -- cgit v1.2.3