From: Vikas Chaudhary <vikas.chaudhary@xxxxxxxxxx>
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@xxxxxxxxxx>
---
drivers/scsi/qla4xxx/ql4_isr.c | 13 ++++++++++---
1 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/qla4xxx/ql4_isr.c b/drivers/scsi/qla4xxx/ql4_isr.c
index 68bdb8c..5050321 100644
--- a/drivers/scsi/qla4xxx/ql4_isr.c
+++ b/drivers/scsi/qla4xxx/ql4_isr.c
@@ -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;
}
--
1.7.1
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