Re: [PATCH v5 10/19] scsi: sd: set read/write commands CDL index

[Hannes Reinecke <hare@suse.de>]

On 4/4/23 20:24, Niklas Cassel wrote:
> From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
> 
> Introduce the command duration limits helper function sd_cdl_dld() to
> set the DLD bits of READ/WRITE 16 and READ/WRITE 32 commands to
> indicate to the device the command duration limit descriptor to apply
> to the commands.
> 
> When command duration limits are enabled, sd_cdl_dld() obtains the
> index of the descriptor to apply to the command using the hints field of
> the request IO priority value (hints IOPRIO_HINT_DEV_DURATION_LIMIT_1 to
> IOPRIO_HINT_DEV_DURATION_LIMIT_7).
> 
> If command duration limits is disabled (which is the default), the limit
> index "0" is always used to indicate "no limit" for a command.
> 
> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
> Co-developed-by: Niklas Cassel <niklas.cassel@wdc.com>
> Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
> ---
>   drivers/scsi/sd.c | 40 ++++++++++++++++++++++++++++++++++------
>   1 file changed, 34 insertions(+), 6 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes