[SCSI] qla4xxx: Correct early completion of pending mbox.

Check for Firmware Hang (AF_FW_RECOVERY) after mailbox command
has gained access to ensure that the mailbox command does not
wait un-necessarily during a firmware recovery and prevent
premature mailbox timeout which will lead to back to back reset's.

Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/qla4xxx/ql4_mbx.c b/drivers/scsi/qla4xxx/ql4_mbx.c
index 7ac21da..c7d101e 100644 (file)
--- a/drivers/scsi/qla4xxx/ql4_mbx.c
+++ b/drivers/scsi/qla4xxx/ql4_mbx.c
@@ -51,25 +51,6 @@ int qla4xxx_mailbox_command(struct scsi_qla_host *ha, uint8_t inCount,
                }
        }
 
-       if (is_qla8022(ha)) {
-               if (test_bit(AF_FW_RECOVERY, &ha->flags)) {
-                       DEBUG2(ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: "
-                           "prematurely completing mbx cmd as firmware "
-                           "recovery detected\n", ha->host_no, __func__));
-                       return status;
-               }
-               /* Do not send any mbx cmd if h/w is in failed state*/
-               qla4_8xxx_idc_lock(ha);
-               dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
-               qla4_8xxx_idc_unlock(ha);
-               if (dev_state == QLA82XX_DEV_FAILED) {
-                       ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: H/W is in "
-                           "failed state, do not send any mailbox commands\n",
-                           ha->host_no, __func__);
-                       return status;
-               }
-       }
-
        if ((is_aer_supported(ha)) &&
            (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))) {
                DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Perm failure on EEH, "
@@ -96,6 +77,25 @@ int qla4xxx_mailbox_command(struct scsi_qla_host *ha, uint8_t inCount,
                msleep(10);
        }
 
+       if (is_qla8022(ha)) {
+               if (test_bit(AF_FW_RECOVERY, &ha->flags)) {
+                       DEBUG2(ql4_printk(KERN_WARNING, ha,
+                                         "scsi%ld: %s: prematurely completing mbx cmd as firmware recovery detected\n",
+                                         ha->host_no, __func__));
+                       goto mbox_exit;
+               }
+               /* Do not send any mbx cmd if h/w is in failed state*/
+               qla4_8xxx_idc_lock(ha);
+               dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
+               qla4_8xxx_idc_unlock(ha);
+               if (dev_state == QLA82XX_DEV_FAILED) {
+                       ql4_printk(KERN_WARNING, ha,
+                                  "scsi%ld: %s: H/W is in failed state, do not send any mailbox commands\n",
+                                  ha->host_no, __func__);
+                       goto mbox_exit;
+               }
+       }
+
        spin_lock_irqsave(&ha->hardware_lock, flags);
 
        ha->mbox_status_count = outCount;