Re: [PATCH v5 1/4] ata: libata: Rename ata_dma_blacklisted()

[Niklas Cassel <cassel@kernel.org>]

On Wed, Jul 24, 2024 at 02:45:36PM +0900, Damien Le Moal wrote:
> Rename the function ata_dma_blacklisted() to ata_dev_nodma() as this new
> name is more neutral. The function signature is also changed to return a
> boolean instead of an int.
> 
> Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
> Reviewed-by: Igor Pylypiv <ipylypiv@google.com>
> ---
>  drivers/ata/libata-core.c | 15 ++++++++-------
>  1 file changed, 8 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
> index c7752dc80028..a35bce4236d3 100644
> --- a/drivers/ata/libata-core.c
> +++ b/drivers/ata/libata-core.c
> @@ -4287,16 +4287,17 @@ static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
>  	return 0;
>  }
>  
> -static int ata_dma_blacklisted(const struct ata_device *dev)
> +static bool ata_dev_nodma(const struct ata_device *dev)
>  {
> -	/* We don't support polling DMA.
> -	 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
> -	 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
> +	/*
> +	 * We do not support polling DMA. Deny DMA for those ATAPI devices
> +	 * with CDB-intr (and use PIO) if the LLDD handles only interrupts in
> +	 * the HSM_ST_LAST state.
>  	 */
>  	if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
>  	    (dev->flags & ATA_DFLAG_CDB_INTR))
> -		return 1;
> -	return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
> +		return true;
> +	return dev->horkage & ATA_HORKAGE_NODMA;
>  }
>  
>  /**
> @@ -4404,7 +4405,7 @@ static void ata_dev_xfermask(struct ata_device *dev)
>  		xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
>  	}
>  
> -	if (ata_dma_blacklisted(dev)) {
> +	if (ata_dev_nodma(dev)) {
>  		xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
>  		ata_dev_warn(dev,
>  			     "device is on DMA blacklist, disabling DMA\n");

Nit: if you rename blacklist, perhaps you should rename/avoid it in the above
print as well.

Regardless:
Reviewed-by: Niklas Cassel <cassel@kernel.org>