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[SCSI] lpfc: Fixes in mbox_timeout_handler

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Analysis:

Timeout of READ_SPARM64 causes call to lpfc_mbox_timeout_handler which
reads psli->mbox_active to determine the timeout mbox.  Timeout
handler then NULL's psli->mbox_active and calls
lpfc_mbx_cmpl_read_sparam(), which on timeout condition, calls
link_down().  link_down() now calls disc_done() which calls
mbox_timeout_hander() again since WORKER_MBOX_TMO is still set, which
goes back to read psli->mbox_active which is already NULL'ed.

Remove redundant if statement in lpfc_mbox_timeout_handler.  pmbox is
assigned psli->mbox_active so there is no need to check if it actually
equals psli->mbox_active.

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James.Smart@Emulex.Com 2005-06-25 10:34:08 -04:00 committed by James Bottomley
parent 6e8215e488
commit db468d108a
1 changed files with 9 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
drivers/scsi/lpfc/lpfc_sli.c
View file

@ -1724,6 +1724,8 @@ lpfc_mbox_timeout_handler(struct lpfc_hba *phba)
return;
}
phba->work_hba_events &= ~WORKER_MBOX_TMO;
pmbox = phba->sli.mbox_active;
mb = &pmbox->mb;
@ -1738,16 +1740,14 @@ lpfc_mbox_timeout_handler(struct lpfc_hba *phba)
phba->sli.sli_flag,
phba->sli.mbox_active);
if (phba->sli.mbox_active == pmbox) {
phba->sli.mbox_active = NULL;
if (pmbox->mbox_cmpl) {
mb->mbxStatus = MBX_NOT_FINISHED;
spin_unlock_irq(phba->host->host_lock);
(pmbox->mbox_cmpl) (phba, pmbox);
spin_lock_irq(phba->host->host_lock);
}
phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
phba->sli.mbox_active = NULL;
if (pmbox->mbox_cmpl) {
mb->mbxStatus = MBX_NOT_FINISHED;
spin_unlock_irq(phba->host->host_lock);
(pmbox->mbox_cmpl) (phba, pmbox);
spin_lock_irq(phba->host->host_lock);
}
phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
spin_unlock_irq(phba->host->host_lock);
lpfc_mbox_abort(phba);