[PATCH 4.9 095/130] bnxt_en: Fix for system hang if request_irq fails

Greg Kroah-Hartman
2018-08-23T09:12:40Z

From: Vikas Gupta <vikas.gupta@broadcom.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@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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
@@ -5560,7 +5560,7 @@ 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;
}
}

@@ -5593,6 +5593,8 @@ static int __bnxt_open_nic(struct bnxt *

open_err:
bnxt_disable_napi(bp);
+
+open_err_irq:
bnxt_del_napi(bp);