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[SCSI] qla2xxx: Add checks for a valid fcport in dev-loss-tmo/terminate_rport_io callbacks. 

Commit f78badb1ae ([SCSI] fc
transport: pre-emptively terminate i/o upon dev_loss_tmo timeout)
changed the callback semantics of dev_loss_tmo and
terminate_rport_io such that repeated calls could be made.  This
could result in the the driver using stale (NULLed-out, in
dev_loss_tmo) data from the rport.  Correct this by addint a
simple check to ensure a valid fcport is attached.

Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Seokmann Ju 2009-01-22 09:45:38 -08:00 committed by James Bottomley
parent 53303c42d5
commit 3c01b4f9fb
1 changed files with 6 additions and 0 deletions
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6
drivers/scsi/qla2xxx/qla_attr.c
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@ -1016,6 +1016,9 @@ qla2x00_dev_loss_tmo_callbk(struct fc_rport *rport)
struct Scsi_Host *host = rport_to_shost(rport);
fc_port_t *fcport = *(fc_port_t **)rport->dd_data;
if (!fcport)
return;
qla2x00_abort_fcport_cmds(fcport);
/*
@ -1033,6 +1036,9 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
{
fc_port_t *fcport = *(fc_port_t **)rport->dd_data;
if (!fcport)
return;
/*
* At this point all fcport's software-states are cleared. Perform any
* final cleanup of firmware resources (PCBs and XCBs).