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@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index e75b6e94f652..9cfd46017e4e 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);