Re: [PATCH v4 2/3] pata_artop: use *switch* in artop_init_one()

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On 2/6/22 05:34, Sergey Shtylyov wrote:
> This driver uses a string of the *if* statements in artop_init_one() where
> the *switch* statement would fit better...
> 
> Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
> ---
> Changes in version 4:
> - fixed up #define DRV_VERSION;
> - expanded the patch description.
> 
> Changes in version 3:
> - fixed up the patch subject.
> 
> Changes in version 2:
> - updated #define DRV_VERSION.
> 
>  drivers/ata/pata_artop.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
> index b734cafb8783..d8c388da0c70 100644
> --- a/drivers/ata/pata_artop.c
> +++ b/drivers/ata/pata_artop.c
> @@ -28,7 +28,7 @@
>  #include <linux/ata.h>
>  
>  #define DRV_NAME	"pata_artop"
> -#define DRV_VERSION	"0.4.7"
> +#define DRV_VERSION	"0.4.8"
>  
>  /*
>   *	The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
> @@ -394,14 +394,18 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
>  	if (rc)
>  		return rc;
>  
> -	if (id->driver_data == 0)	/* 6210 variant */
> +	switch (id->driver_data) {
> +	case 0:		/* 6210 variant */
>  		ppi[0] = &info_6210;
> -	else if (id->driver_data == 1)	/* 6260 */
> +		break;
> +	case 1:		/* 6260 */
>  		ppi[0] = &info_626x;
> -	else if (id->driver_data == 2) { /* 6280 or 6280 + fast */
> +		break;
> +	case 2:		/* 6280 or 6280 + fast */
>  		ppi[0] = &info_628x;
>  		if (inb(pci_resource_start(pdev, 4)) & 0x10)
>  			ppi[0] = &info_628x_fast;

Why not use "if () else" here ? And I do not see the point of patch 1.
Since this patch is rewriting this hunk anyway, let's squash patch 1
into this one.

> +		break;
>  	}
>  
>  	BUG_ON(ppi[0] == NULL);


-- 
Damien Le Moal
Western Digital Research



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