linux-kernel - Re: [PATCH] scsi: core: ufs-pci: hide unused ufshcd_pci

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Date:   Tue, 19 Oct 2021 09:32:13 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Arnd Bergmann <arnd@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Avri Altman <avri.altman@....com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Daejun Park <daejun7.park@...sung.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: core: ufs-pci: hide unused ufshcd_pci_restore
 function

On 10/19/21 8:35 AM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> When CONFIG_PM_SLEEP is disabled, ufshcd_pci_restore() fails
> to compile but is also unused:
> 
> drivers/scsi/ufs/ufshcd-pci.c: In function 'ufshcd_pci_restore':
> drivers/scsi/ufs/ufshcd-pci.c:459:16: error: implicit declaration of function 'ufshcd_system_resume'; did you mean 'ufshcd_runtime_resume'? [-Werror=implicit-function-declaration]
>    459 |         return ufshcd_system_resume(dev);
>        |                ^~~~~~~~~~~~~~~~~~~~
>        |                ufshcd_runtime_resume
> At top level:
> drivers/scsi/ufs/ufshcd-pci.c:452:12: error: 'ufshcd_pci_restore' defined but not used [-Werror=unused-function]
>    452 | static int ufshcd_pci_restore(struct device *dev)
>        |            ^~~~~~~~~~~~~~~~~~
> 
> Enclose it within the same #ifdef as the related code.
> 
> Fixes: 21431d5bdf15 ("scsi: core: ufs-pci: Force a full restore after suspend-to-disk")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/scsi/ufs/ufshcd-pci.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c
> index d65e6cd7a28d..51424557810d 100644
> --- a/drivers/scsi/ufs/ufshcd-pci.c
> +++ b/drivers/scsi/ufs/ufshcd-pci.c
> @@ -449,6 +449,7 @@ static struct ufs_hba_variant_ops ufs_intel_lkf_hba_vops = {
>   	.device_reset		= ufs_intel_device_reset,
>   };
>   
> +#ifdef CONFIG_PM_SLEEP
>   static int ufshcd_pci_restore(struct device *dev)
>   {
>   	struct ufs_hba *hba = dev_get_drvdata(dev);
> @@ -458,6 +459,7 @@ static int ufshcd_pci_restore(struct device *dev)
>   
>   	return ufshcd_system_resume(dev);
>   }
> +#endif
>   
>   /**
>    * ufshcd_pci_shutdown - main function to put the controller in reset state
> 

Reviewed-by: Bart Van Assche <bvanassche@....org>