Subject: Re: [PATCH] ath11k: Remove unused variable in ath11k_dp_rx_mon_merg_msdus()

From: Kalle Valo <[email-masked]>
Date: Tue, 5 Oct 2021 14:29:30 +0000 (UTC)

Tim Gardner <[email-masked]> wrote:

> Coverity complains that a constant variable guards dead code. In fact,
> mpdu_buf is set NULL and never updated.
> 
> 4834err_merge_fail:
>         null: At condition mpdu_buf, the value of mpdu_buf must be NULL.
>         dead_error_condition: The condition mpdu_buf cannot be true.
> CID 92162 (#1 of 1): 'Constant' variable guards dead code (DEADCODE)
> dead_error_line: Execution cannot reach the expression decap_format !=
>   DP_RX_DECAP_TYPE_RAW inside this statement: if (mpdu_buf && decap_forma....
> Local variable mpdu_buf is assigned only once, to a constant value, making it
>   effectively constant throughout its scope. If this is not the intent, examine
>   the logic to see if there is a missing assignment that would make mpdu_buf not
>   remain constant.
> 4835        if (mpdu_buf && decap_format != DP_RX_DECAP_TYPE_RAW) {
> 
> Fix this by removing mpdu_buf and unreachable code.
> 
> Cc: Kalle Valo <[email-masked]>
> Cc: "David S. Miller" <[email-masked]>
> Cc: Jakub Kicinski <[email-masked]>
> Cc: [email-masked]
> Cc: [email-masked]
> Cc: [email-masked]
> Cc: [email-masked]
> Signed-off-by: Tim Gardner <[email-masked]>
> Signed-off-by: Kalle Valo <[email-masked]>

Patch applied to ath-next branch of ath.git, thanks.

7210b4b77fe4 ath11k: Remove unused variable in ath11k_dp_rx_mon_merg_msdus()

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