[PATCH 5.9 058/757] sfc: move initialisation of efx->filter_sem to efx_init_struct()

Greg Kroah-Hartman
2020-10-27T15:33:01Z

From: Edward Cree <ecree@solarflare.com>

[ Upstream commit 05f90bf3d5df40e1a705527520e5fd56b2b6f09e ]

efx_probe_filters() has not been called yet when EF100 calls into
efx_mcdi_filter_table_probe(), for which it wants to take the
filter_sem.

Fixes: a9dc3d5612ce ("sfc_ef100: RX filter table management and related gubbins")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Link: https://lore.kernel.org/r/24fad43e-887d-051e-25e3-506f23f63abf@solarflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/sfc/efx_common.c | 1 +
drivers/net/ethernet/sfc/rx_common.c | 1 -
2 files changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/sfc/efx_common.c
+++ b/drivers/net/ethernet/sfc/efx_common.c
@@ -1030,6 +1030,7 @@ int efx_init_struct(struct efx_nic *efx,
efx->num_mac_stats = MC_CMD_MAC_NSTATS;
BUILD_BUG_ON(MC_CMD_MAC_NSTATS - 1 != MC_CMD_MAC_GENERATION_END);
mutex_init(&efx->mac_lock);
+ init_rwsem(&efx->filter_sem);
#ifdef CONFIG_RFS_ACCEL
mutex_init(&efx->rps_mutex);
spin_lock_init(&efx->rps_hash_lock);
--- a/drivers/net/ethernet/sfc/rx_common.c
+++ b/drivers/net/ethernet/sfc/rx_common.c
@@ -797,7 +797,6 @@ int efx_probe_filters(struct efx_nic *ef
{
int rc;

- init_rwsem(&efx->filter_sem);
mutex_lock(&efx->mac_lock);
down_write(&efx->filter_sem);
rc = efx->type->filter_table_probe(efx);