[PATCH] Register interrupt handler when net device is registered. Avoids missing

[Pierre Ossman <drzeus@drzeus.cx>]

interrupts if the interrupt mask gets out of sync.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

---

The reason this patch is needed for me is that the resume function is
broken. It enables interrupts unconditionally, but the interrupt handler
is only registered when the device is up.

I don't have enough knowledge about the driver to fix the resume
function so this patch will instead make sure that the interrupt handler
is registered at all times (which can be a nice safeguard even when the
resume function gets fixed).
---

 drivers/net/8139cp.c |   17 +++++++----------
 1 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c
--- a/drivers/net/8139cp.c
+++ b/drivers/net/8139cp.c
@@ -1196,20 +1196,11 @@ static int cp_open (struct net_device *d
 
 	cp_init_hw(cp);
 
-	rc = request_irq(dev->irq, cp_interrupt, SA_SHIRQ, dev->name, dev);
-	if (rc)
-		goto err_out_hw;
-
 	netif_carrier_off(dev);
 	mii_check_media(&cp->mii_if, netif_msg_link(cp), TRUE);
 	netif_start_queue(dev);
 
 	return 0;
-
-err_out_hw:
-	cp_stop_hw(cp);
-	cp_free_rings(cp);
-	return rc;
 }
 
 static int cp_close (struct net_device *dev)
@@ -1230,7 +1221,6 @@ static int cp_close (struct net_device *
 	spin_unlock_irqrestore(&cp->lock, flags);
 
 	synchronize_irq(dev->irq);
-	free_irq(dev->irq, dev);
 
 	cp_free_rings(cp);
 	return 0;
@@ -1814,6 +1804,10 @@ static int cp_init_one (struct pci_dev *
 	if (rc)
 		goto err_out_iomap;
 
+	rc = request_irq(dev->irq, cp_interrupt, SA_SHIRQ, dev->name, dev);
+	if (rc)
+		goto err_out_unreg;
+
 	printk (KERN_INFO "%s: RTL-8139C+ at 0x%lx, "
 		"%02x:%02x:%02x:%02x:%02x:%02x, "
 		"IRQ %d\n",
@@ -1833,6 +1827,8 @@ static int cp_init_one (struct pci_dev *
 
 	return 0;
 
+err_out_unreg:
+	unregister_netdev(dev);
 err_out_iomap:
 	iounmap(regs);
 err_out_res:
@@ -1853,6 +1849,7 @@ static void cp_remove_one (struct pci_de
 
 	if (!dev)
 		BUG();
+	free_irq(dev->irq, dev);
 	unregister_netdev(dev);
 	iounmap(cp->regs);
 	if (cp->wol_enabled) pci_set_power_state (pdev, PCI_D0);

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/