linux-kernel - [PATCH 4.4 51/79] bnxt_en: Fix for system hang if request

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Message-Id: <20180823074922.442947994@linuxfoundation.org>
Date:   Thu, 23 Aug 2018 09:53:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vikas Gupta <vikas.gupta@...adcom.com>,
        Michael Chan <michael.chan@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.4 51/79] bnxt_en: Fix for system hang if request_irq fails

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

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

From: Vikas Gupta <vikas.gupta@...adcom.com>

[ Upstream commit c58387ab1614f6d7fb9e244f214b61e7631421fc ]

Fix bug in the error code path when bnxt_request_irq() returns failure.
bnxt_disable_napi() should not be called in this error path because
NAPI has not been enabled yet.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vikas Gupta <vikas.gupta@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -4591,7 +4591,7 @@ static int __bnxt_open_nic(struct bnxt *
 		rc = bnxt_request_irq(bp);
 		if (rc) {
 			netdev_err(bp->dev, "bnxt_request_irq err: %x\n", rc);
-			goto open_err;
+			goto open_err_irq;
 		}
 	}
 
@@ -4629,6 +4629,8 @@ static int __bnxt_open_nic(struct bnxt *
 
 open_err:
 	bnxt_disable_napi(bp);
+
+open_err_irq:
 	bnxt_del_napi(bp);
 
 open_err_free_mem: