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Message-ID: <4b16edaa-05ee-1dbd-e44b-c7e0512971bd@infradead.org>
Date:   Mon, 25 Apr 2022 11:47:11 -0700
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Subject: Re: [PATCH 01/11] scsi: aacraid: Fix undefined behavior due to shift
 overflowing the constant
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To:     Borislav Petkov <bp@alien8.de>, LKML <linux-kernel@vger.kernel.org>
Cc:     Adaptec OEM Raid Solutions <aacraid@microsemi.com>,
        "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        linux-scsi@vger.kernel.org
References: <20220405151517.29753-1-bp@alien8.de>
 <20220405151517.29753-2-bp@alien8.de>
From:   Randy Dunlap <rdunlap@infradead.org>
In-Reply-To: <20220405151517.29753-2-bp@alien8.de>
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On 4/5/22 08:15, Borislav Petkov wrote:
> From: Borislav Petkov <bp@suse.de>
> 
> Fix
> 
>   drivers/scsi/aacraid/commsup.c: In function ‘aac_handle_sa_aif’:
>   drivers/scsi/aacraid/commsup.c:1983:2: error: case label does not reduce to an integer constant
>     case SA_AIF_BPCFG_CHANGE:
>     ^~~~
> 
> See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory
> details as to why it triggers with older gccs only.
> 
> Signed-off-by: Borislav Petkov <bp@suse.de>
> Cc: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
> Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
> Cc: linux-scsi@vger.kernel.org

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>

Thanks.

> ---
>  drivers/scsi/aacraid/aacraid.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
> index f849e7c9d428..5e115e8b2ba4 100644
> --- a/drivers/scsi/aacraid/aacraid.h
> +++ b/drivers/scsi/aacraid/aacraid.h
> @@ -121,7 +121,7 @@ enum {
>  #define SA_AIF_PDEV_CHANGE		(1<<4)
>  #define SA_AIF_LDEV_CHANGE		(1<<5)
>  #define SA_AIF_BPSTAT_CHANGE		(1<<30)
> -#define SA_AIF_BPCFG_CHANGE		(1<<31)
> +#define SA_AIF_BPCFG_CHANGE		(1U<<31)
>  
>  #define HBA_MAX_SG_EMBEDDED		28
>  #define HBA_MAX_SG_SEPARATE		90

-- 
~Randy