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Date: Tue, 01 Mar 2011 17:41:01 +0100
From: Michael Jones <michael.jones@matrix-vision.de>
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To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>,
	Linux Media Mailing List <linux-media@vger.kernel.org>
Subject: omap3isp cache error when unloading
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Hi all,

I get a warning about a cache error with the following steps:

0. load omap3-isp
1. set up media broken media pipeline. (e.g. set different formats on
opposite ends of a link, as will be the case for using the lane shifter)
2. try to capture images.  isp_video_streamon() returns -EPIPE from the
failed isp_video_validate_pipeline() call.
3. unload omap3-isp module

then I get the following from kmem_cache_destroy():

slab error in kmem_cache_destroy(): cache `iovm_area_cache': Can't free all objects
[<c0040318>] (unwind_backtrace+0x0/0xec) from [<c00bfe14>] (kmem_cache_destroy+0x88/0xf4)
[<c00bfe14>] (kmem_cache_destroy+0x88/0xf4) from [<c00861f8>] (sys_delete_module+0x1c4/0x230)
[<c00861f8>] (sys_delete_module+0x1c4/0x230) from [<c003b680>] (ret_fast_syscall+0x0/0x30)

Then, when reloading the module:
SLAB: cache with size 32 has lost its name

Can somebody else confirm that they also observe this behavior?

-Michael

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