From: Devin Heitmueller <dheitmueller@linuxtv.org>
Date: Mon, 23 Mar 2009 02:39:12 +0000 (-0300)
Subject: V4L/DVB (11140): usbvision: fix oops on ARM platform when allocating transfer buffers
X-Git-Tag: firefly_0821_release~15196^2~145
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f876897015e15e879ad531f78260086a7fdee813;p=firefly-linux-kernel-4.4.55.git

V4L/DVB (11140): usbvision: fix oops on ARM platform when allocating transfer buffers

Add missing URB_NO_TRANSFER_DMA_MAP flag, since the use of consistent memory
is not permitted for DMA on the ARM platform.

Thanks to Paul Thomas <pthomas8589@gmail.com> for providing sample ARM hardware
that was experiencing the oops (tested on the at91rm9200 based LinuxStamp).

Thanks to David Brownell <david-b@pacbell.net> for providing insight into the
ARM memory architecture.

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/video/usbvision/usbvision-core.c b/drivers/media/video/usbvision/usbvision-core.c
index 71cb4aabdf7d..a0feb1c97736 100644
--- a/drivers/media/video/usbvision/usbvision-core.c
+++ b/drivers/media/video/usbvision/usbvision-core.c
@@ -2503,7 +2503,7 @@ int usbvision_init_isoc(struct usb_usbvision *usbvision)
 		urb->dev = dev;
 		urb->context = usbvision;
 		urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
-		urb->transfer_flags = URB_ISO_ASAP;
+		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 		urb->interval = 1;
 		urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
 		urb->complete = usbvision_isocIrq;