linux-kernel - [PATCH 2 0/4] cciss rmmod/scan-thread fixes

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Message-ID: <20090721195517.20740.18994.stgit@bob.kio>
Date:	Tue, 21 Jul 2009 13:55:17 -0600
From:	Andrew Patterson <andrew.patterson@...com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, linux-scsi@...r.kernel.org,
	mike.miller@...com, jens.axboe@...cle.com
Subject: [PATCH 2 0/4] cciss rmmod/scan-thread fixes

The following series fixes several problems causing hangs while
rmmoding the cciss driver. In the process of fixing these hangs, I
also reworked the the logical drive scanning kernel thread to use one
thread per driver rather than one thread per controller. I also added
a sysfs attribute to kick off a controller scan.

Changelog

v2

Staticially initialize scan_mutex and scan_q.
Remove unneeded function declarations.
Added a patch that uses a mutex to indicate we are busy initializing
rather than a integer flag.
Remove a possible scan race by moving the busy_initializing unlock after
the call to rebuild_luntable in cciss_init_one.
Reworked the scan thread to use a more traditional loop with a
set_current_state(TASK_INTERRUPTIBLE); schedule() at the top of the
loop.

 .../ABI/testing/sysfs-bus-pci-devices-cciss        |    7 +
 drivers/block/cciss.c                              |  204 +++++++++++++++++---
 drivers/block/cciss.h                              |    9 +
 3 files changed, 191 insertions(+), 29 deletions(-)

Andrew Patterson (4):
      cciss: remove logical drive sysfs entries during driver cleanup.
      cciss: use mutex instead of flag to indicate busy initializing
      cciss: use only one scan thread
      cciss: kick off logical drive topology rescan through sysfs

-- 
Andrew Patterson
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