]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[SCSI] zfcp: Hold queue lock when checking port/unit handle for task management cmd
authorChristof Schmitt <christof.schmitt@de.ibm.com>
Thu, 20 Dec 2007 11:30:27 +0000 (12:30 +0100)
committerJames Bottomley <James.Bottomley@HansenPartnership.com>
Sat, 12 Jan 2008 00:29:07 +0000 (18:29 -0600)
commitfdf234527a070f6fc89f3ec5ee4ae1b263e59939
treead2b5c44584d1add3519887a8a8aef74f85fa922
parentba1724202aafed4bbc4a239ac6fb433f454fddea
[SCSI] zfcp: Hold queue lock when checking port/unit handle for task management cmd

We need to hold the queue-lock when checking whether we still have a valid
unit/port handle for the task management command, i.e whether we can issue this
request for this unit/port. If the error recovery is about to close this
unit/port, then it competes for the queue-lock. If the close request issued by
the error recovery wins, then it is guaranteed that this unit/port has been
blocked for other requests.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
drivers/s390/scsi/zfcp_fsf.c