igb: fix legacy mode irq issue
I booted an igb kernel with the option pci=nomsi and instantly noticed
that interrupts no longer worked on my igb device. I took a look at the
interrupt initialization and quickly discovered a comment stating:
"DO NOT USE EIAME or IAME in legacy mode"
It seemed a bit odd that bits to enable IAM were being set in legacy
interrupt mode, so I dropped out the following parts and interrupts
began working fine again.
[Updated code flow and a nitpick spelling error --Auke]
Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index bff280e..3480cc7 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -439,7 +439,7 @@
err = igb_request_msix(adapter);
if (!err) {
/* enable IAM, auto-mask,
- * DO NOT USE EIAME or IAME in legacy mode */
+ * DO NOT USE EIAM or IAM in legacy mode */
wr32(E1000_IAM, IMS_ENABLE_MASK);
goto request_done;
}
@@ -465,14 +465,9 @@
err = request_irq(adapter->pdev->irq, &igb_intr, IRQF_SHARED,
netdev->name, netdev);
- if (err) {
+ if (err)
dev_err(&adapter->pdev->dev, "Error %d getting interrupt\n",
err);
- goto request_done;
- }
-
- /* enable IAM, auto-mask */
- wr32(E1000_IAM, IMS_ENABLE_MASK);
request_done:
return err;