sfc: correctly initialise filter rwsem for farch

[ Upstream commit cafb39600e7a73263122a0e2db052d691686378f ]

Fixes: fc7a6c287ff3 ("sfc: use a semaphore to lock farch filters too")
Suggested-by: Joseph Korty <joe.korty@concurrent-rt.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c
index c72adf8b52eac62fd31cf16f3dbae15ee1404381..9165e2b0c5900f73073d2bce3e7651140720cea9 100644 (file)
--- a/drivers/net/ethernet/sfc/farch.c
+++ b/drivers/net/ethernet/sfc/farch.c
@@ -2794,6 +2794,7 @@ int efx_farch_filter_table_probe(struct efx_nic *efx)
        if (!state)
                return -ENOMEM;
        efx->filter_state = state;
+       init_rwsem(&state->lock);
 
        table = &state->table[EFX_FARCH_FILTER_TABLE_RX_IP];
        table->id = EFX_FARCH_FILTER_TABLE_RX_IP;