Commit 5b8a2345 authored by Niklas Cassel's avatar Niklas Cassel Committed by Jens Axboe
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docs: sysfs-block-device: improve ncq_prio_enable documentation 



NCQ priority is an optional feature of the NCQ feature set and should
not be confused with the NCQ feature set itself. Clarify the
description of the ncq_prio_enable attribute to avoid this confusion.

Also add the missing documentation for the equivalent
sas_ncq_prio_enable attribute.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20210816014456.2191776-11-damien.lemoal@wdc.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 5f91b8f5

Documentation/ABI/testing/sysfs-block-device

+17 −3
Original line number Diff line number Diff line
@@ -55,6 +55,20 @@ Date: Oct, 2016 
KernelVersion:	v4.10

Contact:	linux-ide@vger.kernel.org

Description:

		(RW) Write to the file to turn on or off the SATA ncq (native

		command queueing) support. By default this feature is turned

		off.
 
		(RW) Write to the file to turn on or off the SATA NCQ (native

		command queueing) priority support. By default this feature is

		turned off. If the device does not support the SATA NCQ

		priority feature, writing "1" to this file results in an error.





What:		/sys/block/*/device/sas_ncq_prio_enable

Date:		Oct, 2016

KernelVersion:	v4.10

Contact:	linux-ide@vger.kernel.org

Description:

		(RW) This is the equivalent of the ncq_prio_enable attribute

		file for SATA devices connected to a SAS host-bus-adapter

		(HBA) implementing support for the SATA NCQ priority feature.

		This file does not exist if the HBA driver does not implement

		support for the SATA NCQ priority feature, regardless of the

		device support for this feature.