[SCSI] ipr: Need to reset adapter after the 6th EEH error

Add reset adapter after the 6th EEH errors in ipr driver. This triggers
the adapter reset via the PCI config space even when the slot is frozen.

Signed-off-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 2197b57fb225..7e64546bd981 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -4777,7 +4777,7 @@ static int ipr_eh_host_reset(struct scsi_cmnd *cmd)
         ioa_cfg = (struct ipr_ioa_cfg *) cmd->device->host->hostdata;
         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
 
-        if (!ioa_cfg->in_reset_reload) {
+        if (!ioa_cfg->in_reset_reload && !ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
                 dev_err(&ioa_cfg->pdev->dev,
                         "Adapter being reset as a result of error recovery.\n");
@@ -6739,6 +6739,7 @@ static int ipr_invalid_adapter(struct ipr_ioa_cfg *ioa_cfg)
 static int ipr_ioa_bringdown_done(struct ipr_cmnd *ipr_cmd)
 {
         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
+        int i;
 
         ENTER;
         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].removing_ioa) {
@@ -6750,6 +6751,13 @@ static int ipr_ioa_bringdown_done(struct ipr_cmnd *ipr_cmd)
 
         ioa_cfg->in_reset_reload = 0;
         ioa_cfg->reset_retries = 0;
+        for (i = 0; i < ioa_cfg->hrrq_num; i++) {
+                spin_lock(&ioa_cfg->hrrq[i]._lock);
+                ioa_cfg->hrrq[i].ioa_is_dead = 1;
+                spin_unlock(&ioa_cfg->hrrq[i]._lock);
+        }
+        wmb();
+
         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
         wake_up_all(&ioa_cfg->reset_wait_q);
         LEAVE;
@@ -8651,7 +8659,7 @@ static void ipr_pci_perm_failure(struct pci_dev *pdev)
         spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
         if (ioa_cfg->sdt_state == WAIT_FOR_DUMP)
                 ioa_cfg->sdt_state = ABORT_DUMP;
-        ioa_cfg->reset_retries = IPR_NUM_RESET_RELOAD_RETRIES;
+        ioa_cfg->reset_retries = IPR_NUM_RESET_RELOAD_RETRIES - 1;
         ioa_cfg->in_ioa_bringdown = 1;
         for (i = 0; i < ioa_cfg->hrrq_num; i++) {
                 spin_lock(&ioa_cfg->hrrq[i]._lock);