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| author | Bart Van Assche <bvanassche@acm.org> | 2011-09-23 19:48:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-11 09:37:02 -0800 |
| commit | 8fa9474347f32c7991adc1271e6f34e01479dd31 (patch) | |
| tree | 12decd3d6a68f59ec337c4c565c7e0d77139e67e /drivers/scsi/hosts.c | |
| parent | 51b702dc3de6c2b5ba3c091f755271776bce7ee4 (diff) | |
| download | kernel_samsung_espresso10-8fa9474347f32c7991adc1271e6f34e01479dd31.zip kernel_samsung_espresso10-8fa9474347f32c7991adc1271e6f34e01479dd31.tar.gz kernel_samsung_espresso10-8fa9474347f32c7991adc1271e6f34e01479dd31.tar.bz2 | |
Make scsi_free_queue() kill pending SCSI commands
commit 3308511c93e6ad0d3c58984ecd6e5e57f96b12c8 upstream.
Make sure that SCSI device removal via scsi_remove_host() does finish
all pending SCSI commands. Currently that's not the case and hence
removal of a SCSI host during I/O can cause a deadlock. See also
"blkdev_issue_discard() hangs forever if underlying storage device is
removed" (http://bugzilla.kernel.org/show_bug.cgi?id=40472). See also
http://lkml.org/lkml/2011/8/27/6.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/scsi/hosts.c')
| -rw-r--r-- | drivers/scsi/hosts.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index 4f7a582..351dc0b 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -286,6 +286,7 @@ static void scsi_host_dev_release(struct device *dev) { struct Scsi_Host *shost = dev_to_shost(dev); struct device *parent = dev->parent; + struct request_queue *q; scsi_proc_hostdir_rm(shost->hostt); @@ -293,9 +294,11 @@ static void scsi_host_dev_release(struct device *dev) kthread_stop(shost->ehandler); if (shost->work_q) destroy_workqueue(shost->work_q); - if (shost->uspace_req_q) { - kfree(shost->uspace_req_q->queuedata); - scsi_free_queue(shost->uspace_req_q); + q = shost->uspace_req_q; + if (q) { + kfree(q->queuedata); + q->queuedata = NULL; + scsi_free_queue(q); } scsi_destroy_command_freelist(shost); |