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net/ibm/emac: add mutex to 'set multicast list'

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for preventing race conditions within ioctl calls.

Signed-off-by: Ivan Mikhaylov <ivan@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Mikhaylov 2016-09-14 19:06:45 +03:00 • committed by David S. Miller
parent 01afd972a7
commit 7106a069f4
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/ibm/emac/core.c
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@ -977,7 +977,10 @@ static void emac_set_multicast_list(struct net_device *ndev)
dev->mcast_pending = 1; dev->mcast_pending = 1;
return; return;
} }
mutex_lock(&dev->link_lock);
__emac_set_multicast_list(dev); __emac_set_multicast_list(dev);
mutex_unlock(&dev->link_lock);
} }
static int emac_set_mac_address(struct net_device *ndev, void *sa) static int emac_set_mac_address(struct net_device *ndev, void *sa)