From: Bhupesh Sharma <bhupesh.sharma@st.com>
Date: Thu, 22 Mar 2012 03:50:37 +0000 (-0300)
Subject: [media] usb: gadget/uvc: Remove non-required locking from 'uvc_queue_next_buffer... 
X-Git-Tag: v3.5-rc1~104^2~428
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=95faf82bd3ea607f8e1ca78930c49b71078266e6;p=pandora-kernel.git

[media] usb: gadget/uvc: Remove non-required locking from 'uvc_queue_next_buffer' routine

This patch removes the non-required spinlock acquire/release calls on
'queue_irqlock' from 'uvc_queue_next_buffer' routine.

This routine is called from 'video->encode' function (which translates to either
'uvc_video_encode_bulk' or 'uvc_video_encode_isoc') in 'uvc_video.c'.
As, the 'video->encode' routines are called with 'queue_irqlock' already held,
so acquiring a 'queue_irqlock' again in 'uvc_queue_next_buffer' routine causes
a spin lock recursion.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@st.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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