From: Nathan Chancellor <nathan@kernel.org>
To: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: linuxarm@huawei.com, mauro.chehab@huawei.com,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
llvm@lists.linux.dev
Subject: Re: [PATCH 04/20] media: drxd: drop offset var from DownloadMicrocode()
Date: Fri, 26 Nov 2021 11:57:59 -0700 [thread overview]
Message-ID: <YaEuN/RLRFptXkHP@archlinux-ax161> (raw)
In-Reply-To: <f4d081b88635e114d69cda30526fa04927be89d2.1637781097.git.mchehab+huawei@kernel.org>
On Wed, Nov 24, 2021 at 08:13:07PM +0100, Mauro Carvalho Chehab wrote:
> The offset is not needed, and it is never used, as the pointer
> itself is already incremented.
>
> So, drop it, in order to solve a W=1 clang warning.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
I would expect GCC to warn about this as well.
> ---
>
> To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
> See [PATCH 00/20] at: https://lore.kernel.org/all/cover.1637781097.git.mchehab+huawei@kernel.org/
>
> drivers/media/dvb-frontends/drxd_hard.c | 8 --------
> 1 file changed, 8 deletions(-)
>
> diff --git a/drivers/media/dvb-frontends/drxd_hard.c b/drivers/media/dvb-frontends/drxd_hard.c
> index a7eb81df88c2..9860cae65f1c 100644
> --- a/drivers/media/dvb-frontends/drxd_hard.c
> +++ b/drivers/media/dvb-frontends/drxd_hard.c
> @@ -914,44 +914,36 @@ static int DownloadMicrocode(struct drxd_state *state,
> u32 Address;
> u16 nBlocks;
> u16 BlockSize;
> - u32 offset = 0;
> int i, status = 0;
>
> pSrc = (u8 *) pMCImage;
> /* We're not using Flags */
> /* Flags = (pSrc[0] << 8) | pSrc[1]; */
> pSrc += sizeof(u16);
> - offset += sizeof(u16);
> nBlocks = (pSrc[0] << 8) | pSrc[1];
> pSrc += sizeof(u16);
> - offset += sizeof(u16);
>
> for (i = 0; i < nBlocks; i++) {
> Address = (pSrc[0] << 24) | (pSrc[1] << 16) |
> (pSrc[2] << 8) | pSrc[3];
> pSrc += sizeof(u32);
> - offset += sizeof(u32);
>
> BlockSize = ((pSrc[0] << 8) | pSrc[1]) * sizeof(u16);
> pSrc += sizeof(u16);
> - offset += sizeof(u16);
>
> /* We're not using Flags */
> /* u16 Flags = (pSrc[0] << 8) | pSrc[1]; */
> pSrc += sizeof(u16);
> - offset += sizeof(u16);
>
> /* We're not using BlockCRC */
> /* u16 BlockCRC = (pSrc[0] << 8) | pSrc[1]; */
> pSrc += sizeof(u16);
> - offset += sizeof(u16);
>
> status = WriteBlock(state, Address, BlockSize,
> pSrc, DRX_I2C_CLEARCRC);
> if (status < 0)
> break;
> pSrc += BlockSize;
> - offset += BlockSize;
> }
>
> return status;
> --
> 2.33.1
>
>
next prev parent reply other threads:[~2021-11-26 19:34 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-24 19:13 [PATCH 00/20] Solve the remaining issues with clang and W=1 on media Mauro Carvalho Chehab
2021-11-24 19:13 ` [PATCH 01/20] media: adv7842: get rid of two unused functions Mauro Carvalho Chehab
2021-11-26 18:54 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 02/20] media: saa7134-go7007: get rid of to_state() function Mauro Carvalho Chehab
2021-11-26 18:55 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 03/20] media: davinci: get rid of an unused function Mauro Carvalho Chehab
2021-11-26 18:56 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 04/20] media: drxd: drop offset var from DownloadMicrocode() Mauro Carvalho Chehab
2021-11-26 18:57 ` Nathan Chancellor [this message]
2021-11-24 19:13 ` [PATCH 05/20] media: drxk: drop operation_mode from set_dvbt() Mauro Carvalho Chehab
2021-11-26 19:02 ` Nathan Chancellor
2021-11-29 8:33 ` [PATCH v2 " Mauro Carvalho Chehab
2021-11-24 19:13 ` [PATCH 06/20] media: m88ds3103: drop reg11 calculus from m88ds3103b_select_mclk() Mauro Carvalho Chehab
2021-11-26 19:40 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 07/20] media: si21xx: report eventual errors at set_frontend Mauro Carvalho Chehab
2021-11-26 19:45 ` Nathan Chancellor
2021-11-29 8:40 ` Mauro Carvalho Chehab
2021-11-24 19:13 ` [PATCH 08/20] media: solo6x10: add _maybe_unused to currently unused functions Mauro Carvalho Chehab
2021-11-25 21:18 ` Ismael Luceno
2021-11-26 19:58 ` Nathan Chancellor
2021-11-29 8:44 ` Mauro Carvalho Chehab
2021-11-24 19:13 ` [PATCH 09/20] media: si470x: fix printk warnings with clang Mauro Carvalho Chehab
2021-11-26 20:13 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 10/20] media: radio-si476x: drop a container_of() abstraction macro Mauro Carvalho Chehab
2021-11-26 20:14 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 11/20] media: lmedm04: don't ignore errors when setting a filter Mauro Carvalho Chehab
2021-11-26 20:16 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 12/20] media: au0828-i2c: drop a duplicated function Mauro Carvalho Chehab
2021-11-26 20:22 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 13/20] media: adv7604 add _maybe_unused to currently unused functions Mauro Carvalho Chehab
2021-11-24 19:13 ` [PATCH 14/20] media: adv7511: drop " Mauro Carvalho Chehab
2021-11-26 20:27 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 15/20] media: imx290: mark read reg function as __maybe_unused Mauro Carvalho Chehab
2021-11-24 19:13 ` [PATCH 16/20] media: davinci: vpbe_osd: " Mauro Carvalho Chehab
2021-11-24 19:13 ` [PATCH 17/20] media: qcom: camss: " Mauro Carvalho Chehab
2021-11-25 10:58 ` Robert Foss
2021-11-24 19:13 ` [PATCH 18/20] media: mtk-mdp: address a clang warning Mauro Carvalho Chehab
2021-11-24 19:21 ` Arnd Bergmann
2021-11-24 19:13 ` [PATCH 19/20] media: cobalt: drop an unused variable Mauro Carvalho Chehab
2021-11-26 20:29 ` Nathan Chancellor
2021-11-24 19:13 ` [PATCH 20/20] media: mxl5005s: drop some dead code Mauro Carvalho Chehab
2021-11-26 20:30 ` Nathan Chancellor
2021-11-24 19:23 ` [PATCH 00/20] Solve the remaining issues with clang and W=1 on media Arnd Bergmann
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