[PATCH][next] net: ipa: remove the redundant assignment to variable trans_id

[PATCH][next] net: ipa: remove the redundant assignment to variable trans_id

[Colin Ian King]

The variable trans_id is being modulo'd by channel->tre_count and
the value is being re-assigned back to trans_id even though the
variable is not used after this operation. The assignment is
redundant. Remove the assignment and just replace it with the modulo
operator.

Cleans up clang scan build warning:
warning: Although the value stored to 'trans_id' is used in the
enclosing expression, the value is never actually read from
'trans_id' [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
---
 drivers/net/ipa/gsi_trans.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ipa/gsi_trans.c b/drivers/net/ipa/gsi_trans.c
index ee6fb00b71eb..f5dafc2f53ab 100644
--- a/drivers/net/ipa/gsi_trans.c
+++ b/drivers/net/ipa/gsi_trans.c
@@ -247,7 +247,7 @@ struct gsi_trans *gsi_channel_trans_complete(struct gsi_channel *channel)
 			return NULL;
 	}
 
-	return &trans_info->trans[trans_id %= channel->tre_count];
+	return &trans_info->trans[trans_id % channel->tre_count];
 }
 
 /* Move a transaction from allocated to committed state */
-- 
2.39.2

Re: [PATCH][next] net: ipa: remove the redundant assignment to variable trans_id

[Alex Elder]

On 1/16/24 5:40 AM, Colin Ian King wrote:
> The variable trans_id is being modulo'd by channel->tre_count and
> the value is being re-assigned back to trans_id even though the
> variable is not used after this operation. The assignment is
> redundant. Remove the assignment and just replace it with the modulo
> operator.
> 
> Cleans up clang scan build warning:
> warning: Although the value stored to 'trans_id' is used in the
> enclosing expression, the value is never actually read from
> 'trans_id' [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@gmail.com>

This looks good.  I saw this before but hadn't gotten around to
fixing it yet.  Thank you!

Reviewed-by: Alex Elder <elder@linaro.org>

> ---
>   drivers/net/ipa/gsi_trans.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ipa/gsi_trans.c b/drivers/net/ipa/gsi_trans.c
> index ee6fb00b71eb..f5dafc2f53ab 100644
> --- a/drivers/net/ipa/gsi_trans.c
> +++ b/drivers/net/ipa/gsi_trans.c
> @@ -247,7 +247,7 @@ struct gsi_trans *gsi_channel_trans_complete(struct gsi_channel *channel)
>   			return NULL;
>   	}
>   
> -	return &trans_info->trans[trans_id %= channel->tre_count];
> +	return &trans_info->trans[trans_id % channel->tre_count];
>   }
>   
>   /* Move a transaction from allocated to committed state */

Re: [PATCH][next] net: ipa: remove the redundant assignment to variable trans_id

[Simon Horman]

On Tue, Jan 16, 2024 at 11:40:25AM +0000, Colin Ian King wrote:
> The variable trans_id is being modulo'd by channel->tre_count and
> the value is being re-assigned back to trans_id even though the
> variable is not used after this operation. The assignment is
> redundant. Remove the assignment and just replace it with the modulo
> operator.
> 
> Cleans up clang scan build warning:
> warning: Although the value stored to 'trans_id' is used in the
> enclosing expression, the value is never actually read from
> 'trans_id' [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@gmail.com>

## Form letter - net-next-closed

[adapted from text by Jakub]

Hi Colin,

The merge window for v6.8 has begun and therefore net-next is closed
for new drivers, features, code refactoring and optimizations.
We are currently accepting bug fixes only.

Please repost when net-next reopens on or after 22nd January.

RFC patches sent for review only are obviously welcome at any time.

See: https://www.kernel.org/doc/html/next/process/maintainer-netdev.html#development-cycle
--
pw-bot: defer

Re: [PATCH][next] net: ipa: remove the redundant assignment to variable trans_id

[Alex Elder]

On 1/16/24 1:31 PM, Simon Horman wrote:
> On Tue, Jan 16, 2024 at 11:40:25AM +0000, Colin Ian King wrote:
>> The variable trans_id is being modulo'd by channel->tre_count and
>> the value is being re-assigned back to trans_id even though the
>> variable is not used after this operation. The assignment is
>> redundant. Remove the assignment and just replace it with the modulo
>> operator.
>>
>> Cleans up clang scan build warning:
>> warning: Although the value stored to 'trans_id' is used in the
>> enclosing expression, the value is never actually read from
>> 'trans_id' [deadcode.DeadStores]
>>
>> Signed-off-by: Colin Ian King <colin.i.king@gmail.com>

Colin, net-next is open now and you are welcome to send v2 of
this patch.
     https://netdev.bots.linux.dev/net-next.html

					-Alex

> 
> ## Form letter - net-next-closed
> 
> [adapted from text by Jakub]
> 
> Hi Colin,
> 
> The merge window for v6.8 has begun and therefore net-next is closed
> for new drivers, features, code refactoring and optimizations.
> We are currently accepting bug fixes only.
> 
> Please repost when net-next reopens on or after 22nd January.
> 
> RFC patches sent for review only are obviously welcome at any time.
> 
> See: https://www.kernel.org/doc/html/next/process/maintainer-netdev.html#development-cycle
> --
> pw-bot: defer