[PATCH][next] netxen_nic: remove redundant assignment to variable capability

[PATCH][next] netxen_nic: remove redundant assignment to variable capability

[Colin Ian King]

The variable capability is being assigned a value that is never
read and is being re-assigned later. The assignment is redundant and
can be removed. Also remove empty line before assignment to capability.

Cleans up clang scan build warning:
drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c:1189:2: warning:
Value stored to 'capability' is never read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
---
 drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
index 35ec9aab3dc7..51fa880eaf6c 100644
--- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
+++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
@@ -1186,7 +1186,6 @@ static int
 netxen_p3_has_mn(struct netxen_adapter *adapter)
 {
 	u32 capability, flashed_ver;
-	capability = 0;
 
 	/* NX2031 always had MN */
 	if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
@@ -1197,7 +1196,6 @@ netxen_p3_has_mn(struct netxen_adapter *adapter)
 	flashed_ver = NETXEN_DECODE_VERSION(flashed_ver);
 
 	if (flashed_ver >= NETXEN_VERSION_CODE(4, 0, 220)) {
-
 		capability = NXRD32(adapter, NX_PEG_TUNE_CAPABILITY);
 		if (capability & NX_PEG_TUNE_MN_PRESENT)
 			return 1;
-- 
2.39.2

Re: [PATCH][next] netxen_nic: remove redundant assignment to variable capability

[Simon Horman]

On Tue, Feb 06, 2024 at 11:50:49AM +0000, Colin Ian King wrote:
> The variable capability is being assigned a value that is never
> read and is being re-assigned later. The assignment is redundant and
> can be removed. Also remove empty line before assignment to capability.
> 
> Cleans up clang scan build warning:
> drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c:1189:2: warning:
> Value stored to 'capability' is never read [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
> ---
>  drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
> index 35ec9aab3dc7..51fa880eaf6c 100644
> --- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
> +++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
> @@ -1186,7 +1186,6 @@ static int
>  netxen_p3_has_mn(struct netxen_adapter *adapter)
>  {
>  	u32 capability, flashed_ver;
> -	capability = 0;

This part looks correct :)

>  
>  	/* NX2031 always had MN */
>  	if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
> @@ -1197,7 +1196,6 @@ netxen_p3_has_mn(struct netxen_adapter *adapter)
>  	flashed_ver = NETXEN_DECODE_VERSION(flashed_ver);
>  
>  	if (flashed_ver >= NETXEN_VERSION_CODE(4, 0, 220)) {
> -

This part doesn't seem strictly related to the patch description.
But in looking at it more closely, I wonder if it would be good
to reduce the scope of capability to this context (and leave the bank
line).

>  		capability = NXRD32(adapter, NX_PEG_TUNE_CAPABILITY);
>  		if (capability & NX_PEG_TUNE_MN_PRESENT)
>  			return 1;

In any case, I agree that this patch is correct, and I'm happy with
it with or without the change I suggested above.

Reviewed-by: Simon Horman <horms@kernel.org>

Re: [PATCH][next] netxen_nic: remove redundant assignment to variable capability

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Tue,  6 Feb 2024 11:50:49 +0000 you wrote:
> The variable capability is being assigned a value that is never
> read and is being re-assigned later. The assignment is redundant and
> can be removed. Also remove empty line before assignment to capability.
> 
> Cleans up clang scan build warning:
> drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c:1189:2: warning:
> Value stored to 'capability' is never read [deadcode.DeadStores]
> 
> [...]

Here is the summary with links:
  - [next] netxen_nic: remove redundant assignment to variable capability
    https://git.kernel.org/netdev/net-next/c/a6c15d7ff29c

You are awesome, thank you!
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