linux-kernel - Re: [PATCH] scsi: elx: efct: Eliminate unnecessary boolean check in efct_hw_command

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Date:   Fri, 18 Jun 2021 15:54:26 -0700
From:   James Smart <jsmart2021@...il.com>
To:     Nathan Chancellor <nathan@...nel.org>,
        James Smart <james.smart@...adcom.com>,
        Ram Vegesna <ram.vegesna@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH] scsi: elx: efct: Eliminate unnecessary boolean check in
 efct_hw_command_cancel()

On 6/16/2021 11:31 PM, Nathan Chancellor wrote:
> clang warns:
> 
> drivers/scsi/elx/efct/efct_hw.c:1523:17: warning: address of array
> 'ctx->buf' will always evaluate to 'true' [-Wpointer-bool-conversion]
>                                (!ctx->buf ? U32_MAX : *((u32 *)ctx->buf)));
>                                 ~~~~~~^~~
> 
> buf is an array in the middle of a struct so deferencing it is not a
> problem as long as ctx is not NULL. Eliminate the check, which fixes the
> warning.
> 
> Fixes: 580c0255e4ef ("scsi: elx: efct: RQ buffer, memory pool allocation and deallocation APIs")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1398
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>
> ---
>   drivers/scsi/elx/efct/efct_hw.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)

Thanks!

Reviewed-by: James Smart <jsmart2021@...il.com>

-- james