From f650fb456f2079b762c131a11397c0a966e2bfe4 Mon Sep 17 00:00:00 2001 From: Edward Cree Date: Tue, 16 Sep 2014 17:05:21 +0100 Subject: [PATCH] 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 Tested-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- drivers/net/ethernet/sfc/farch.c | 3 +++ 1 file changed, 3 insertions(+) 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); -- 2.34.1