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[SCSI] qla4xxx: Clear interrupt while unloading driver. 

while processing the stop firmware mailbox command on driver unload,
a interrupt is processed which causes kernel panic as the response
queue is not valid.

Fix is to clear the interrupt in free_adapter call just after
disabling the interrupts.

Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Vikas Chaudhary 2012-08-22 07:45:25 -04:00 committed by James Bottomley
parent 8e9157c832
commit d9e62e5130
1 changed files with 9 additions and 0 deletions
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9
drivers/scsi/qla4xxx/ql4_os.c
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@ -3487,6 +3487,15 @@ static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
ha->isp_ops->disable_intrs(ha);
}
if (is_qla40XX(ha)) {
writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
&ha->reg->ctrl_status);
readl(&ha->reg->ctrl_status);
} else if (is_qla8022(ha)) {
writel(0, &ha->qla4_8xxx_reg->host_int);
readl(&ha->qla4_8xxx_reg->host_int);
}
/* Remove timer thread, if present */
if (ha->timer_active)
qla4xxx_stop_timer(ha);