Re: [PATCH v2] scsi: Remember if a device is an ATA device

[Igor Pylypiv <ipylypiv@google.com>]

On Wed, Jun 11, 2025 at 06:34:21PM +0900, Damien Le Moal wrote:
> scsi_add_lun() tests the device vendor string of SCSI devices to detect
> if a SCSI device is in fact an ATA device, in order to correctly handle
> SATL power management. The function scsi_cdl_enable() also requires
> knowing if a SCSI device is an ATA device to control the state of the
> device CDL feature but this function does that by testing for the
> presence of the VPD page 89h (ATA INFORMATION page).
> sd_read_write_same() also has a similar test.
> 
> Simplify these different methods by adding the is_ata field to struct
> scsi_device to remember that a SCSI device is in fact an ATA one based
> on the device vendor name test. This filed can also allow low level
> SCSI host adapter drivers to take special actions for ATA devices
> (e.g. to better handle ATA NCQ errors).
> 
> With this, simplify scsi_cdl_enable() and sd_read_write_same().
> 
> Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

Reviewed-by: Igor Pylypiv <ipylypiv@google.com>

Thanks,
Igor