linux-kernel - Re: [PATCH 3/3] megaraid_sas: add missing curly braces in ioctl handler

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Date:	Mon, 14 Mar 2016 16:20:29 +0100
From:	Hannes Reinecke <hare@...e.de>
To:	Arnd Bergmann <arnd@...db.de>, martin.petersen@...cle.com,
	James.Bottomley@...senPartnership.com,
	Kashyap Desai <kashyap.desai@...gotech.com>,
	Sumit Saxena <sumit.saxena@...gotech.com>,
	Uday Lingala <uday.lingala@...gotech.com>,
	"James E.J. Bottomley" <JBottomley@...n.com>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tomas Henzl <thenzl@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	megaraidlinux.pdl@...gotech.com
Subject: Re: [PATCH 3/3] megaraid_sas: add missing curly braces in ioctl
 handler

On 03/14/2016 03:29 PM, Arnd Bergmann wrote:
> gcc-6 found a dubious indentation in the megasas_mgmt_fw_ioctl
> function:
> 
> drivers/scsi/megaraid/megaraid_sas_base.c: In function 'megasas_mgmt_fw_ioctl':
> drivers/scsi/megaraid/megaraid_sas_base.c:6658:4: warning: statement is indented as if it were guarded by... [-Wmisleading-indentation]
>     kbuff_arr[i] = NULL;
>     ^~~~~~~~~
> drivers/scsi/megaraid/megaraid_sas_base.c:6653:3: note: ...this 'if' clause, but it is not
>    if (kbuff_arr[i])
>    ^~
> 
> The code is actually correct, as there is no downside in clearing a NULL
> pointer again.
> 
> This clarifies the code and avoids the warning by adding extra curly
> braces.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 90dc9d98f01b ("megaraid_sas : MFI MPT linked list corruption fix")
> ---
>  drivers/scsi/megaraid/megaraid_sas_base.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
> index 5c08568ccfbf..2627200d4f82 100644
> --- a/drivers/scsi/megaraid/megaraid_sas_base.c
> +++ b/drivers/scsi/megaraid/megaraid_sas_base.c
> @@ -6650,12 +6650,13 @@ out:
>  	}
>  
>  	for (i = 0; i < ioc->sge_count; i++) {
> -		if (kbuff_arr[i])
> +		if (kbuff_arr[i]) {
>  			dma_free_coherent(&instance->pdev->dev,
>  					  le32_to_cpu(kern_sge32[i].length),
>  					  kbuff_arr[i],
>  					  le32_to_cpu(kern_sge32[i].phys_addr));
>  			kbuff_arr[i] = NULL;
> +		}
>  	}
>  
>  	megasas_return_cmd(instance, cmd);
> 
Reviewed-by: Hannes Reinecke <hare@...e.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@...e.de			               +49 911 74053 688
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