linux-kernel - Re: [PATCH v2] drm/hisilicon: Fixed the warning: Assignment of 0/1 to bool variable

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Date:   Tue, 28 Jul 2020 09:56:32 +0200
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Tian Tao <tiantao6@...ilicon.com>, puck.chen@...ilicon.com,
        airlied@...ux.ie, daniel@...ll.ch, kraxel@...hat.com,
        alexander.deucher@....com, tglx@...utronix.de,
        dri-devel@...ts.freedesktop.org, xinliang.liu@...aro.org,
        linux-kernel@...r.kernel.org
Cc:     linuxarm@...wei.com
Subject: Re: [PATCH v2] drm/hisilicon: Fixed the warning: Assignment of 0/1 to
 bool variable

Hi

Am 07.07.20 um 04:58 schrieb Tian Tao:
> fixed the following warning:
> hibmc_drm_drv.c:296:1-18:WARNING: Assignment of 0/1 to bool variable.
> hibmc_drm_drv.c:301:2-19: WARNING: Assignment of 0/1 to bool variable.
> 
> v2:
> using the pci_dev.msi_enabled instead of priv->msi_enabled.
> 
> Signed-off-by: Tian Tao <tiantao6@...ilicon.com>
> ---
>  drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 6 +++---
>  drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 1 -
>  2 files changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> index 249c298..83c7bb5 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> @@ -254,7 +254,7 @@ static int hibmc_unload(struct drm_device *dev)
>  
>  	if (dev->irq_enabled)
>  		drm_irq_uninstall(dev);
> -	if (priv->msi_enabled)
> +	if (dev->pdev->msi_enabled)

You don't need these tests and you don't have to set
dev->pdev->msi_enabled by yourself. Just call pci_enable_msi() and
pci_disable_msi() and they should do the right thing.

Best regards
Thomas

>  		pci_disable_msi(dev->pdev);
>  
>  	hibmc_kms_fini(priv);
> @@ -294,12 +294,12 @@ static int hibmc_load(struct drm_device *dev)
>  		goto err;
>  	}
>  
> -	priv->msi_enabled = 0;
> +	dev->pdev->msi_enabled = 0;
>  	ret = pci_enable_msi(dev->pdev);
>  	if (ret) {
>  		DRM_WARN("enabling MSI failed: %d\n", ret);
>  	} else {
> -		priv->msi_enabled = 1;
> +		dev->pdev->msi_enabled = 1;
>  		ret = drm_irq_install(dev, dev->pdev->irq);
>  		if (ret)
>  			DRM_WARN("install irq failed: %d\n", ret);
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> index 6097687..a683763 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> @@ -25,7 +25,6 @@ struct hibmc_drm_private {
>  	void __iomem   *fb_map;
>  	unsigned long  fb_base;
>  	unsigned long  fb_size;
> -	bool msi_enabled;
>  
>  	/* drm */
>  	struct drm_device  *dev;
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer



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