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

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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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This commit is contained in:

Laurent Pinchart 2014-07-23 10:30:57 -03:00 • committed by Mauro Carvalho Chehab

parent d903a0a367

commit cd73bb6c4e

2 changed files with 34 additions and 12 deletions

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43

drivers/media/platform/omap3isp/ispresizer.c

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3

drivers/media/platform/omap3isp/ispresizer.h

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