lkml.org 
[lkml]   [2018]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.16 57/81] net: aquantia: oops when shutdown on already stopped device
Date
4.16-stable review patch.  If anyone has any objections, please let me know.

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

From: Igor Russkikh <igor.russkikh@aquantia.com>


[ Upstream commit 9a11aff25fd43d5bd2660ababdc9f564b0ba183a ]

In case netdev is closed at the moment of pci shutdown, aq_nic_stop
gets called second time. napi_disable in that case hangs indefinitely.
In other case, if device was never opened at all, we get oops because
of null pointer access.

We should invoke aq_nic_stop conditionally, only if device is running
at the moment of shutdown.

Reported-by: David Arcari <darcari@redhat.com>
Fixes: 90869ddfefeb ("net: aquantia: Implement pci shutdown callback")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -951,9 +951,11 @@ void aq_nic_shutdown(struct aq_nic_s *se

netif_device_detach(self->ndev);

- err = aq_nic_stop(self);
- if (err < 0)
- goto err_exit;
+ if (netif_running(self->ndev)) {
+ err = aq_nic_stop(self);
+ if (err < 0)
+ goto err_exit;
+ }
aq_nic_deinit(self);

err_exit:

\
 
 \ /
  Last update: 2018-04-27 16:25    [W:0.119 / U:0.504 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site