linux-kernel - Re: [PATCH][next] soundwire: intel_auxdevice: remove redundant assignment to variable link

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Date: Mon, 5 Feb 2024 13:52:57 -0600
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To: Colin Ian King <colin.i.king@...il.com>, Vinod Koul <vkoul@...nel.org>,
 Bard Liao <yung-chuan.liao@...ux.intel.com>,
 Sanyog Kale <sanyog.r.kale@...el.com>, alsa-devel@...a-project.org
Cc: kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] soundwire: intel_auxdevice: remove redundant
 assignment to variable link_flags

Thanks for the clean-up!

> The variable link_flags is being initialized with a value that is never
> read, it is being re-assigned later on. The initialization is
> redundant and can be removed.
> 
> Cleans up clang scan build warning:
> drivers/soundwire/intel_auxdevice.c:624:2: warning: Value stored
> to 'link_flags' is never read [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>
> ---
>  drivers/soundwire/intel_auxdevice.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c
> index 93698532deac..95125cc2fc59 100644
> --- a/drivers/soundwire/intel_auxdevice.c
> +++ b/drivers/soundwire/intel_auxdevice.c
> @@ -621,8 +621,6 @@ static int __maybe_unused intel_resume(struct device *dev)
>  		return 0;
>  	}
>  
> -	link_flags = md_flags >> (bus->link_id * 8);
> -

this redundant line is 3+ years old now, added in a2d9c161db24
("soundwire: intel: pm_runtime idle scheduling")

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

>  	if (pm_runtime_suspended(dev)) {
>  		dev_dbg(dev, "pm_runtime status was suspended, forcing active\n");
>