linux-kernel - [PATCH 4.19 64/84] bnxt: disable napi before canceling DIM

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Message-Id: <20210824170250.710392-65-sashal@kernel.org>
Date:   Tue, 24 Aug 2021 13:02:30 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Michael Chan <michael.chan@...adcom.com>,
        Edwin Peer <edwin.peer@...adcom.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 64/84] bnxt: disable napi before canceling DIM

From: Jakub Kicinski <kuba@...nel.org>

[ Upstream commit 01cca6b9330ac7460de44eeeb3a0607f8aae69ff ]

napi schedules DIM, napi has to be disabled first,
then DIM canceled.

Noticed while reading the code.

Fixes: 0bc0b97fca73 ("bnxt_en: cleanup DIM work on device shutdown")
Fixes: 6a8788f25625 ("bnxt_en: add support for software dynamic interrupt moderation")
Reviewed-by: Michael Chan <michael.chan@...adcom.com>
Reviewed-by: Edwin Peer <edwin.peer@...adcom.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index c4ddd8f71b93..55827ac65a15 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6269,10 +6269,9 @@ static void bnxt_disable_napi(struct bnxt *bp)
 	for (i = 0; i < bp->cp_nr_rings; i++) {
 		struct bnxt_cp_ring_info *cpr = &bp->bnapi[i]->cp_ring;
 
+		napi_disable(&bp->bnapi[i]->napi);
 		if (bp->bnapi[i]->rx_ring)
 			cancel_work_sync(&cpr->dim.work);
-
-		napi_disable(&bp->bnapi[i]->napi);
 	}
 }
 
-- 
2.30.2