From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Wed, 23 Jul 2014 13:30:57 +0000 (-0300)
Subject: [media] omap3isp: resizer: Protect against races when updating crop
X-Git-Tag: fixes-against-v3.18-rc2~130^2^2~495
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd73bb6c4e493cbe227f7861d96dd864a71fe5bc;p=pandora-kernel.git

[media] omap3isp: resizer: Protect against races when updating crop

When updating the crop rectangle during streaming, the IRQ handler will
reprogram the resizer after the current frame. A race condition
currently exists between the set selection operation and the IRQ
handler: if the set selection operation is called twice in a row and the
IRQ handler runs only during the second call, it could reprogram the
hardware with partially updated values. Use a spinlock to protect
against that.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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