linux-kernel - Re: [PATCH] scsi: ibmvfc: Mark expected switch fall-throughs

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Date:   Tue, 30 Jul 2019 18:41:53 -0700
From:   Tyrel Datwyler <tyreld@...ux.ibm.com>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     linux-scsi@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH] scsi: ibmvfc: Mark expected switch fall-throughs

On 7/28/19 5:26 PM, Gustavo A. R. Silva wrote:
> Mark switch cases where we are expecting to fall through.
> 
> This patch fixes the following warnings:
> 
> drivers/scsi/ibmvscsi/ibmvfc.c: In function 'ibmvfc_npiv_login_done':
> drivers/scsi/ibmvscsi/ibmvfc.c:4022:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    ibmvfc_retry_host_init(vhost);
>    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/scsi/ibmvscsi/ibmvfc.c:4023:2: note: here
>   case IBMVFC_MAD_DRIVER_FAILED:
>   ^~~~
> drivers/scsi/ibmvscsi/ibmvfc.c: In function 'ibmvfc_bsg_request':
> drivers/scsi/ibmvscsi/ibmvfc.c:1830:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
>    ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     (bsg_request->rqst_data.h_els.port_id[1] << 8) |
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     bsg_request->rqst_data.h_els.port_id[2];
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/scsi/ibmvscsi/ibmvfc.c:1833:2: note: here
>   case FC_BSG_RPT_ELS:
>   ^~~~
> drivers/scsi/ibmvscsi/ibmvfc.c:1838:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
>    ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     bsg_request->rqst_data.h_ct.port_id[2];
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/scsi/ibmvscsi/ibmvfc.c:1841:2: note: here
>   case FC_BSG_RPT_CT:
>   ^~~~
> 
> Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> ---

Acked-by: Tyrel Datwyler <tyreld@...ux.ibm.com>