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authorAndy Gospodarek <andy@greyhouse.net>2008-02-15 17:05:25 -0500
committerJeff Garzik <jeff@garzik.org>2008-02-23 23:55:01 -0500
commit6cb5e57701d355737f0bc9f94c0f80ed69a95b62 (patch)
treec4d4e715ba4c87a4518ed2dba7a11ce2186cb2bb /drivers
parent5bd3670f31f1c58f500e55c4cdbc243fb4b2e3df (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/igb/igb_main.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index bff280eff5e3..3480cc72467a 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -439,7 +439,7 @@ static int igb_request_irq(struct igb_adapter *adapter)
439 err = igb_request_msix(adapter); 439 err = igb_request_msix(adapter);
440 if (!err) { 440 if (!err) {
441 /* enable IAM, auto-mask, 441 /* enable IAM, auto-mask,
442 * DO NOT USE EIAME or IAME in legacy mode */ 442 * DO NOT USE EIAM or IAM in legacy mode */
443 wr32(E1000_IAM, IMS_ENABLE_MASK); 443 wr32(E1000_IAM, IMS_ENABLE_MASK);
444 goto request_done; 444 goto request_done;
445 } 445 }
@@ -465,14 +465,9 @@ static int igb_request_irq(struct igb_adapter *adapter)
465 err = request_irq(adapter->pdev->irq, &igb_intr, IRQF_SHARED, 465 err = request_irq(adapter->pdev->irq, &igb_intr, IRQF_SHARED,
466 netdev->name, netdev); 466 netdev->name, netdev);
467 467
468 if (err) { 468 if (err)
469 dev_err(&adapter->pdev->dev, "Error %d getting interrupt\n", 469 dev_err(&adapter->pdev->dev, "Error %d getting interrupt\n",
470 err); 470 err);
471 goto request_done;
472 }
473
474 /* enable IAM, auto-mask */
475 wr32(E1000_IAM, IMS_ENABLE_MASK);
476 471
477request_done: 472request_done:
478 return err; 473 return err;