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[SCSI] qla4xxx: Fix double IDC locking in qla4_8xxx_error_recovery

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Issue:
In qla4_8xxx_error_recovery() IDC lock recovery is initiated as
IDC lock is held while enabling the interrupts

Fix:
Correctly handle IDC locking mechanism in qla4_8xxx_error_recovery().

Signed-off-by: Poornima Vonti <poornima.vonti@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Poornima Vonti 2012-09-20 07:35:04 -04:00 committed by James Bottomley
parent fbd8107cc9
commit 8276190725
1 changed files with 4 additions and 2 deletions
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6
drivers/scsi/qla4xxx/ql4_os.c
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@ -6140,22 +6140,25 @@ static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
ha->isp_ops->idc_unlock(ha);
clear_bit(AF_FW_RECOVERY, &ha->flags);
rval = qla4xxx_initialize_adapter(ha, RESET_ADAPTER);
ha->isp_ops->idc_lock(ha);
if (rval != QLA_SUCCESS) {
ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
"FAILED\n", ha->host_no, __func__);
ha->isp_ops->idc_lock(ha);
qla4_8xxx_clear_drv_active(ha);
qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DEV_STATE,
QLA8XXX_DEV_FAILED);
ha->isp_ops->idc_unlock(ha);
} else {
ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
"READY\n", ha->host_no, __func__);
ha->isp_ops->idc_lock(ha);
qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DEV_STATE,
QLA8XXX_DEV_READY);
/* Clear driver state register */
qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DRV_STATE, 0);
qla4_8xxx_set_drv_active(ha);
ha->isp_ops->idc_unlock(ha);
ret = qla4xxx_request_irqs(ha);
if (ret) {
ql4_printk(KERN_WARNING, ha, "Failed to "
@ -6167,7 +6170,6 @@ static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
rval = QLA_SUCCESS;
}
}
ha->isp_ops->idc_unlock(ha);
} else {
ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
"the reset owner\n", ha->host_no, __func__,