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[SCSI] qla4xxx: Prevent MSI/MSI-X falling back to INTx for ISP82XX

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For ISP82xx mixed interrupt mode is not supported.
Hence prevent MSI/MSI-x from falling back to INTx mode.

Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Vikas Chaudhary 2012-09-20 07:35:06 -04:00 committed by James Bottomley
parent 39c9582601
commit 109a008bfe
1 changed files with 10 additions and 3 deletions
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13
drivers/scsi/qla4xxx/ql4_isr.c
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@ -1364,9 +1364,15 @@ try_msi:
pci_disable_msi(ha->pdev);
}
}
ql4_printk(KERN_WARNING, ha,
"MSI: Falling back-to INTx mode -- %d.\n", ret);
/*
* Prevent interrupts from falling back to INTx mode in cases where
* interrupts cannot get acquired through MSI-X or MSI mode.
*/
if (is_qla8022(ha)) {
ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret);
goto irq_not_attached;
}
try_intx:
/* Trying INTx */
ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
@ -1380,7 +1386,7 @@ try_intx:
ql4_printk(KERN_WARNING, ha,
"INTx: Failed to reserve interrupt %d already in"
" use.\n", ha->pdev->irq);
return ret;
goto irq_not_attached;
}
irq_attached:
@ -1388,6 +1394,7 @@ irq_attached:
ha->host->irq = ha->pdev->irq;
ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
__func__, ha->pdev->irq);
irq_not_attached:
return ret;
}