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[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>
This commit is contained in:
Lalit Chandivade 2012-04-23 22:32:32 -07:00 коммит произвёл James Bottomley
Родитель 8d55e507d2
Коммит 5f50aa3ad5
1 изменённых файлов: 19 добавлений и 19 удалений
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38
drivers/scsi/qla4xxx/ql4_mbx.c
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@ -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;