linux-kernel - Re: [PATCH] ata: ep93xx: Use proper enums for directions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20181004114834eucas1p236dcc3d55686d347a82e79cc5b1628ba~aZWbN2bbZ0357203572eucas1p2e@eucas1p2.samsung.com>
Date:   Thu, 4 Oct 2018 13:48:33 +0200
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Jens Axboe <axboe@...nel.dk>, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH] ata: ep93xx: Use proper enums for directions


On 10/04/2018 04:37 AM, Nathan Chancellor wrote:
> Clang warns when one enumerated type is implicitly converted to another.
> 
> drivers/ata/pata_ep93xx.c:662:36: warning: implicit conversion from
> enumeration type 'enum dma_data_direction' to different enumeration type
> 'enum dma_transfer_direction' [-Wenum-conversion]
>         drv_data->dma_rx_data.direction = DMA_FROM_DEVICE;
>                                         ~ ^~~~~~~~~~~~~~~
> drivers/ata/pata_ep93xx.c:670:36: warning: implicit conversion from
> enumeration type 'enum dma_data_direction' to different enumeration type
> 'enum dma_transfer_direction' [-Wenum-conversion]
>         drv_data->dma_tx_data.direction = DMA_TO_DEVICE;
>                                         ~ ^~~~~~~~~~~~~
> drivers/ata/pata_ep93xx.c:681:19: warning: implicit conversion from
> enumeration type 'enum dma_data_direction' to different enumeration type
> 'enum dma_transfer_direction' [-Wenum-conversion]
>         conf.direction = DMA_FROM_DEVICE;
>                        ~ ^~~~~~~~~~~~~~~
> drivers/ata/pata_ep93xx.c:692:19: warning: implicit conversion from
> enumeration type 'enum dma_data_direction' to different enumeration type
> 'enum dma_transfer_direction' [-Wenum-conversion]
>         conf.direction = DMA_TO_DEVICE;
>                        ~ ^~~~~~~~~~~~~
> 
> Use the equivalent valued enums from the expected type so that Clang no
> longer warns about a conversion.
> 
> DMA_TO_DEVICE = DMA_MEM_TO_DEV = 1
> DMA_FROM_DEVICE = DMA_DEV_TO_MEM = 2
> 
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>

Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics