netdev - [PATCH -next 2/8] bnx2: Check if_running() before touching chip registers.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 21 Aug 2009 19:20:44 -0700
From:	"Michael Chan" <mchan@...adcom.com>
To:	davem@...emloft.net
cc:	netdev@...r.kernel.org
Subject: [PATCH -next 2/8] bnx2: Check if_running() before touching chip
 registers.

Add this check to bnx2_netif_stop() and bnx2_vlan_rx_register() to
prevent bus lockups on some systems when the chip is in low power state.

Signed-off-by: Michael Chan <mchan@...adcom.com>
---
 drivers/net/bnx2.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index e75b6e9..9cfd460 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -619,6 +619,9 @@ bnx2_disable_int_sync(struct bnx2 *bp)
 	int i;
 
 	atomic_inc(&bp->intr_sem);
+	if (!netif_running(bp->dev))
+		return;
+
 	bnx2_disable_int(bp);
 	for (i = 0; i < bp->irq_nvecs; i++)
 		synchronize_irq(bp->irq_tbl[i].vector);
@@ -6254,9 +6257,14 @@ bnx2_vlan_rx_register(struct net_device *dev, struct vlan_group *vlgrp)
 {
 	struct bnx2 *bp = netdev_priv(dev);
 
-	bnx2_netif_stop(bp);
+	if (netif_running(dev))
+		bnx2_netif_stop(bp);
 
 	bp->vlgrp = vlgrp;
+
+	if (!netif_running(dev))
+		return;
+
 	bnx2_set_rx_mode(dev);
 	if (bp->flags & BNX2_FLAG_CAN_KEEP_VLAN)
 		bnx2_fw_sync(bp, BNX2_DRV_MSG_CODE_KEEP_VLAN_UPDATE, 0, 1);
-- 
1.5.6.GIT


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html