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sfc: fix addr_list_lock spinlock use before init

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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>
This commit is contained in:
Edward Cree 2014-09-16 17:05:21 +01:00 committed by David S. Miller
parent 929a031dfd
commit f650fb456f
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/sfc/farch.c
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@ -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);