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From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: jiri@mellanox.com, idosch@mellanox.com, davem@davemloft.net
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Subject: [PATCH] mlxsw: core: Fix an error handling path in 'mlxsw_core_bus_device_register()'
Date: Thu, 10 May 2018 13:26:16 +0200	[thread overview]
Message-ID: <20180510112616.20508-1-christophe.jaillet@wanadoo.fr> (raw)

Resources are not freed in the reverse order of the allocation.
Labels are also mixed-up.

Fix it and reorder code and labels in the error handling path of
'mlxsw_core_bus_device_register()'

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Please review carefully. This patch is proposed because it triggers one of
my coccinelle scripts. I'm not 100% sure if correct.

The script tries to spot wrongly ordered error handling path. It is:
@@
identifier l1, l2;
@@

   if (...) {
      ...
*     goto l1;
   }
   ...
   if (...) {
      ...
*     goto l2;
   }
   ...
*l1:
   ...
*l2:
   ...
---
 drivers/net/ethernet/mellanox/mlxsw/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 93ea56620a24..e13ac3b8dff7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1100,11 +1100,11 @@ int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
 err_alloc_lag_mapping:
 	mlxsw_ports_fini(mlxsw_core);
 err_ports_init:
-	mlxsw_bus->fini(bus_priv);
-err_bus_init:
 	if (!reload)
 		devlink_resources_unregister(devlink, NULL);
 err_register_resources:
+	mlxsw_bus->fini(bus_priv);
+err_bus_init:
 	if (!reload)
 		devlink_free(devlink);
 err_devlink_alloc:
-- 
2.17.0

WARNING: multiple messages have this Message-ID (diff)
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: jiri@mellanox.com, idosch@mellanox.com, davem@davemloft.net
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Subject: [PATCH] mlxsw: core: Fix an error handling path in 'mlxsw_core_bus_device_register()'
Date: Thu, 10 May 2018 11:26:16 +0000	[thread overview]
Message-ID: <20180510112616.20508-1-christophe.jaillet@wanadoo.fr> (raw)

Resources are not freed in the reverse order of the allocation.
Labels are also mixed-up.

Fix it and reorder code and labels in the error handling path of
'mlxsw_core_bus_device_register()'

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Please review carefully. This patch is proposed because it triggers one of
my coccinelle scripts. I'm not 100% sure if correct.

The script tries to spot wrongly ordered error handling path. It is:
@@
identifier l1, l2;
@@

   if (...) {
      ...
*     goto l1;
   }
   ...
   if (...) {
      ...
*     goto l2;
   }
   ...
*l1:
   ...
*l2:
   ...
---
 drivers/net/ethernet/mellanox/mlxsw/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 93ea56620a24..e13ac3b8dff7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1100,11 +1100,11 @@ int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
 err_alloc_lag_mapping:
 	mlxsw_ports_fini(mlxsw_core);
 err_ports_init:
-	mlxsw_bus->fini(bus_priv);
-err_bus_init:
 	if (!reload)
 		devlink_resources_unregister(devlink, NULL);
 err_register_resources:
+	mlxsw_bus->fini(bus_priv);
+err_bus_init:
 	if (!reload)
 		devlink_free(devlink);
 err_devlink_alloc:
-- 
2.17.0


             reply	other threads:[~2018-05-10 11:26 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-10 11:26 Christophe JAILLET [this message]
2018-05-10 11:26 ` [PATCH] mlxsw: core: Fix an error handling path in 'mlxsw_core_bus_device_register()' Christophe JAILLET
2018-05-10 11:58 ` Ido Schimmel
2018-05-10 11:58   ` Ido Schimmel
2018-05-11 15:57   ` David Miller
2018-05-11 15:57     ` David Miller
2018-05-10 12:41 ` Dan Carpenter
2018-05-10 12:41   ` Dan Carpenter
2018-05-10 13:08   ` [PATCH] mlxsw: core: Fix an error handling path in \'mlxsw_core_bus_device_register()\' Arkadi Sharshevsky
2018-05-10 13:17     ` Dan Carpenter

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