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authorEdward Cree <ecree@solarflare.com>2014-09-16 20:05:21 +0400
committerDavid S. Miller <davem@davemloft.net>2014-09-17 00:33:34 +0400
commitf650fb456f2079b762c131a11397c0a966e2bfe4 (patch)
tree3e998d35f9b42155c24f268ad9aeb69ccf6854a2 /drivers/net/ethernet
parent929a031dfd62aae34bf8e728f712e6751e416d1f (diff)
downloadlinux-f650fb456f2079b762c131a11397c0a966e2bfe4.tar.xz
sfc: fix addr_list_lock spinlock use before init
Reported by Nikolay Aleksandrov. In efx_init_port() we call efx_mac_reconfigure() to work around a Falcon/A1 limitation, and this calls efx_{arch}_filter_sync_rx_mode(), which takes the addr_list_lock; but this lock is uninitialised, because we haven't called register_netdevice() yet. So, in efx_farch_filter_sync_rx_mode(), check efx_dev_registered() before doing anything else. The EF10 equivalent, efx_ef10_filter_sync_rx_mode(), already has the corresponding check. Signed-off-by: Edward Cree <ecree@solarflare.com> Tested-by: Nikolay Aleksandrov <nikolay@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r--drivers/net/ethernet/sfc/farch.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c
index 0537381cd2f6..6859437b59fb 100644
--- a/drivers/net/ethernet/sfc/farch.c
+++ b/drivers/net/ethernet/sfc/farch.c
@@ -2933,6 +2933,9 @@ void efx_farch_filter_sync_rx_mode(struct efx_nic *efx)
u32 crc;
int bit;
+ if (!efx_dev_registered(efx))
+ return;
+
netif_addr_lock_bh(net_dev);
efx->unicast_filter = !(net_dev->flags & IFF_PROMISC);