netdev - [PATCH net-next 2/3] sfc: forget filters from sw table if hw replies ENOENT on removing them

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Date:   Fri, 17 Feb 2017 15:50:12 +0000
From:   Edward Cree <ecree@...arflare.com>
To:     <linux-net-drivers@...arflare.com>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>
Subject: [PATCH net-next 2/3] sfc: forget filters from sw table if hw replies
 ENOENT on removing them

From: Bert Kenward <bkenward@...arflare.com>

If the hw doesn't think they exist, we should defer to its authority.

Signed-off-by: Edward Cree <ecree@...arflare.com>
---
 drivers/net/ethernet/sfc/ef10.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 7da9699..ec976ff 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -4309,13 +4309,18 @@ static int efx_ef10_filter_remove_internal(struct efx_nic *efx,
 			       MC_CMD_FILTER_OP_IN_OP_UNSUBSCRIBE);
 		MCDI_SET_QWORD(inbuf, FILTER_OP_IN_HANDLE,
 			       table->entry[filter_idx].handle);
-		rc = efx_mcdi_rpc(efx, MC_CMD_FILTER_OP,
-				  inbuf, sizeof(inbuf), NULL, 0, NULL);
+		rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FILTER_OP,
+					inbuf, sizeof(inbuf), NULL, 0, NULL);
 
 		spin_lock_bh(&efx->filter_lock);
-		if (rc == 0) {
+		if ((rc == 0) || (rc == -ENOENT)) {
+			/* Filter removed OK or didn't actually exist */
 			kfree(spec);
 			efx_ef10_filter_set_entry(table, filter_idx, NULL, 0);
+		} else {
+			efx_mcdi_display_error(efx, MC_CMD_FILTER_OP,
+					       MC_CMD_FILTER_OP_IN_LEN,
+					       NULL, 0, rc);
 		}
 	}