netdev - [PATCH 4/5 net-next] cnic: Improve NETDEV

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Date:	Wed, 8 Jun 2011 22:29:35 -0700
From:	"Michael Chan" <mchan@...adcom.com>
To:	davem@...emloft.net
cc:	netdev@...r.kernel.org
Subject: [PATCH 4/5 net-next] cnic: Improve NETDEV_UP event handling

During NETDEV_UP, we use symbol_get() to get the net driver's cnic
probe function.  This sometimes doesn't work if NETDEV_UP happens
right after NETDEV_REGISTER and the net driver is still running module
init code.  As a result, the cnic device may not be discovered.  We
fix this by probing on all NETDEV events if the device's netif_running
state is up.

Signed-off-by: Michael Chan <mchan@...adcom.com>
---
 drivers/net/cnic.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/cnic.c b/drivers/net/cnic.c
index a529bde..6c544b3 100644
--- a/drivers/net/cnic.c
+++ b/drivers/net/cnic.c
@@ -5342,7 +5342,7 @@ static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
 
 	dev = cnic_from_netdev(netdev);
 
-	if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
+	if (!dev && (event == NETDEV_REGISTER || netif_running(netdev))) {
 		/* Check for the hot-plug device */
 		dev = is_cnic_dev(netdev);
 		if (dev) {
@@ -5358,7 +5358,7 @@ static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
 		else if (event == NETDEV_UNREGISTER)
 			cnic_ulp_exit(dev);
 
-		if (event == NETDEV_UP) {
+		if (event == NETDEV_UP || (new_dev && netif_running(netdev))) {
 			if (cnic_register_netdev(dev) != 0) {
 				cnic_put(dev);
 				goto done;
-- 
1.6.4.GIT


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