[PATCH 4.17 059/101] sfc: correctly initialise filter rwsem for farch

[Greg Kroah-Hartman]

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bert Kenward <bkenw...@solarflare.com>

[ Upstream commit cafb39600e7a73263122a0e2db052d691686378f ]

Fixes: fc7a6c287ff3 ("sfc: use a semaphore to lock farch filters too")
Suggested-by: Joseph Korty <joe.ko...@concurrent-rt.com>
Signed-off-by: Bert Kenward <bkenw...@solarflare.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/ethernet/sfc/farch.c |    1 +
 1 file changed, 1 insertion(+)

--- 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
        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;