[PATCH 2/2] net/ibm/emac: add mutex to 'set multicast list'

From	Ivan Mikhaylov <ivan@de.ibm.com>
Newsgroups	linux.kernel
Subject	[PATCH 2/2] net/ibm/emac: add mutex to 'set multicast list'
Date	2016-09-14 18:10 +0200
Message-ID	<shkV4-2Zu-13@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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for preventing race conditions within ioctl calls.

Signed-off-by: Ivan Mikhaylov <ivan@de.ibm.com>
---
 drivers/net/ethernet/ibm/emac/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c
index 2dfc603..7af09cb 100644
--- a/drivers/net/ethernet/ibm/emac/core.c
+++ b/drivers/net/ethernet/ibm/emac/core.c
@@ -977,7 +977,10 @@ static void emac_set_multicast_list(struct net_device *ndev)
 		dev->mcast_pending = 1;
 		return;
 	}
+
+	mutex_lock(&dev->link_lock);
 	__emac_set_multicast_list(dev);
+	mutex_unlock(&dev->link_lock);
 }
 
 static int emac_set_mac_address(struct net_device *ndev, void *sa)
-- 
2.7.4 (Apple Git-66)

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[PATCH 2/2] net/ibm/emac: add mutex to 'set multicast list' Ivan Mikhaylov <ivan@de.ibm.com> - 2016-09-14 18:10 +0200
  Re: [PATCH 2/2] net/ibm/emac: add mutex to 'set multicast list' David Miller <davem@davemloft.net> - 2016-09-16 10:30 +0200

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