Re: [PATCH] mtd: blkdevs: fix potential deadlock + lockdep warnings
From: Brian Norris
Date: Fri Oct 30 2015 - 20:27:32 EST
On Mon, Oct 26, 2015 at 07:38:49PM -0700, Brian Norris wrote:
> Commit 073db4a51ee4 ("mtd: fix: avoid race condition when accessing
> mtd->usecount") fixed a race condition but due to poor ordering of the
> mutex acquisition, introduced a potential deadlock.
> Fixes: 073db4a51ee4 ("mtd: fix: avoid race condition when accessing mtd->usecount")
> Reported-by: Felipe Balbi <balbi@xxxxxx>
> Tested-by: Felipe Balbi <balbi@xxxxxx>
> Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
Pushed to l2-mtd.git.
> Resending as a proper patch
> Note: I tried to reproduce this lockdep warning myself but couldn't. But I saw
> no problem under the new patch either.
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