[SCSI] zfcp: Hold queue lock when checking port/unit handle for abort command
authorChristof Schmitt <christof.schmitt@de.ibm.com>
Thu, 20 Dec 2007 11:30:24 +0000 (12:30 +0100)
committerJames Bottomley <James.Bottomley@HansenPartnership.com>
Sat, 12 Jan 2008 00:29:03 +0000 (18:29 -0600)
commit951f746fece2e24a26853b3872d16e9013b6fe0b
treec63d1a0a262cb642bd2861b774b647de8f048b18
parent8627533c115c546649693d68fed6a74762c47d51
[SCSI] zfcp: Hold queue lock when checking port/unit handle for abort command

We need to hold the queue-lock when checking whether we still have a valid
unit/port handle for the abort 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