From: Andrew Morton <akpm@linux-foundation.org>
To: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Cc: axboe@kernel.dk, stephenmcameron@gmail.com,
mikem@beardog.cce.hp.com, linux-kernel@vger.kernel.org,
thenzl@redhat.com
Subject: Re: [PATCH] cciss: fix broken mutex usage in ioctl
Date: Wed, 29 May 2013 15:03:42 -0700 [thread overview]
Message-ID: <20130529150342.7f16e4402c82227604931984@linux-foundation.org> (raw)
In-Reply-To: <20130524192841.21256.51523.stgit@beardog.cce.hp.com>
On Fri, 24 May 2013 14:28:41 -0500 "Stephen M. Cameron" <scameron@beardog.cce.hp.com> wrote:
> If a new logical drive is added and the CCISS_REGNEWD ioctl is invoked
> (as is normal with the Array Configuration Utility) the process
> will hang as below. It attempts to acquire the same mutex twice, once
> in do_ioctl() and once in cciss_unlocked_open(). The BKL was recursive,
> the mutex isn't.
huh, now that's a really old-school deadlock. I wonder why lockdep
didn't shout about it.
next prev parent reply other threads:[~2013-05-29 22:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-24 19:28 Stephen M. Cameron
2013-05-29 22:03 ` Andrew Morton [this message]
2013-05-29 22:16 ` scameron
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