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Commit d9e62e51 authored by Vikas Chaudhary's avatar Vikas Chaudhary Committed by James Bottomley
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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: default avatarVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: default avatarMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 8e9157c8

drivers/scsi/qla4xxx/ql4_os.c

+9 −0
Original line number Diff line number Diff line
@@ -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);