[PATCH] ethernet: aquantia: remove redundant checks on error status

[PATCH] ethernet: aquantia: remove redundant checks on error status

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

The error status err is initialized as zero and then being checked
several times to see if it is less than zero even when it has not
been updated. Since these checks are redundant we can remove these
as well as err and the error exit label err_exit.

Detected by CoverityScan, CID#1398313 and CID#1398306 ("Logically
dead code")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c | 13 +------------
 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c | 12 +-----------
 2 files changed, 2 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
index 4ee15ff06a44..faeb4935ef3e 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
@@ -200,29 +200,18 @@ static int hw_atl_a0_hw_rss_set(struct aq_hw_s *self,
 static int hw_atl_a0_hw_offload_set(struct aq_hw_s *self,
 				    struct aq_nic_cfg_s *aq_nic_cfg)
 {
-	int err = 0;
-
 	/* TX checksums offloads*/
 	tpo_ipv4header_crc_offload_en_set(self, 1);
 	tpo_tcp_udp_crc_offload_en_set(self, 1);
-	if (err < 0)
-		goto err_exit;
 
 	/* RX checksums offloads*/
 	rpo_ipv4header_crc_offload_en_set(self, 1);
 	rpo_tcp_udp_crc_offload_en_set(self, 1);
-	if (err < 0)
-		goto err_exit;
 
 	/* LSO offloads*/
 	tdm_large_send_offload_en_set(self, 0xFFFFFFFFU);
-	if (err < 0)
-		goto err_exit;
-
-	err = aq_hw_err_from_flags(self);
 
-err_exit:
-	return err;
+	return aq_hw_err_from_flags(self);
 }
 
 static int hw_atl_a0_hw_init_tx_path(struct aq_hw_s *self)
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index 42150708191d..1bceb7358e5c 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -200,25 +200,18 @@ static int hw_atl_b0_hw_rss_set(struct aq_hw_s *self,
 static int hw_atl_b0_hw_offload_set(struct aq_hw_s *self,
 				    struct aq_nic_cfg_s *aq_nic_cfg)
 {
-	int err = 0;
 	unsigned int i;
 
 	/* TX checksums offloads*/
 	tpo_ipv4header_crc_offload_en_set(self, 1);
 	tpo_tcp_udp_crc_offload_en_set(self, 1);
-	if (err < 0)
-		goto err_exit;
 
 	/* RX checksums offloads*/
 	rpo_ipv4header_crc_offload_en_set(self, 1);
 	rpo_tcp_udp_crc_offload_en_set(self, 1);
-	if (err < 0)
-		goto err_exit;
 
 	/* LSO offloads*/
 	tdm_large_send_offload_en_set(self, 0xFFFFFFFFU);
-	if (err < 0)
-		goto err_exit;
 
 /* LRO offloads */
 	{
@@ -245,10 +238,7 @@ static int hw_atl_b0_hw_offload_set(struct aq_hw_s *self,
 
 		rpo_lro_en_set(self, aq_nic_cfg->is_lro ? 0xFFFFFFFFU : 0U);
 	}
-	err = aq_hw_err_from_flags(self);
-
-err_exit:
-	return err;
+	return aq_hw_err_from_flags(self);
 }
 
 static int hw_atl_b0_hw_init_tx_path(struct aq_hw_s *self)
-- 
2.11.0

Re: [PATCH] ethernet: aquantia: remove redundant checks on error status

[David Miller]

From: Colin King <colin.king@canonical.com>
Date: Thu, 11 May 2017 18:29:29 +0100

> From: Colin Ian King <colin.king@canonical.com>
> 
> The error status err is initialized as zero and then being checked
> several times to see if it is less than zero even when it has not
> been updated. Since these checks are redundant we can remove these
> as well as err and the error exit label err_exit.
> 
> Detected by CoverityScan, CID#1398313 and CID#1398306 ("Logically
> dead code")
> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

Please enhance your commit message to also explain that the functions
being called around these checks all return void, to make it clear
that this isn't an issue of the return values not being checked.

Thanks.

Re: [PATCH] ethernet: aquantia: remove redundant checks on error status

[Colin Ian King]

On 11/05/17 19:16, David Miller wrote:
> From: Colin King <colin.king@canonical.com>
> Date: Thu, 11 May 2017 18:29:29 +0100
> 
>> From: Colin Ian King <colin.king@canonical.com>
>>
>> The error status err is initialized as zero and then being checked
>> several times to see if it is less than zero even when it has not
>> been updated. Since these checks are redundant we can remove these
>> as well as err and the error exit label err_exit.
>>
>> Detected by CoverityScan, CID#1398313 and CID#1398306 ("Logically
>> dead code")
>>
>> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> 
> Please enhance your commit message to also explain that the functions
> being called around these checks all return void, to make it clear
> that this isn't an issue of the return values not being checked.
> 
> Thanks.
> 
Good idea. Will do.