[SCSI] lpfc 8.1.4 : Introduce lpfc_reset_barrier() function for resets on dual channel adapters
Introduce lpfc_reset_barrier() function for resets on dual channel adapters
Workaround for a hardware errata on dual channel asics. There is a
potential for the chip to lock up on a reset if a shared dma engine is in
use. The (ugly) work around requires a reset process which uses a mailbox
command to synchronize the independent channels prior to the reset to
avoid the issue. Unfortunately, the timing windows required to ensure this
workaround succeeds are very specific, meaning we can't release the cpu
during the barrier.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index a2e1543..66d5d00 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -464,8 +464,6 @@
lpfc_els_flush_cmd(phba);
lpfc_disc_flush_list(phba);
- /* Disable SLI2 since we disabled interrupts */
- phba->sli.sli_flag &= ~LPFC_SLI2_ACTIVE;
return (0);
}
@@ -526,6 +524,7 @@
phba->work_status[0], phba->work_status[1]);
spin_lock_irq(phba->host->host_lock);
phba->fc_flag |= FC_ESTABLISH_LINK;
+ psli->sli_flag &= ~LPFC_SLI2_ACTIVE;
spin_unlock_irq(phba->host->host_lock);
/*
@@ -559,6 +558,7 @@
phba->brd_no, phba->work_hs,
phba->work_status[0], phba->work_status[1]);
+ psli->sli_flag &= ~LPFC_SLI2_ACTIVE;
lpfc_offline(phba);
phba->hba_state = LPFC_HBA_ERROR;
lpfc_hba_down_post(phba);