ata_std_qc_defer

Langue: en

Autres versions - même langue

Version: June 2009 (debian - 07/07/09)

Section: 9 (Appels noyau Linux)

Sommaire

NAME

ata_std_qc_defer - Check whether a qc needs to be deferred

SYNOPSIS

int ata_std_qc_defer(struct ata_queued_cmd * qc);

ARGUMENTS

qc

ATA command in question

DESCRIPTION

Non-NCQ commands cannot run with any other command, NCQ or not. As upper layer only knows the queue depth, we are responsible for maintaining exclusion. This function checks whether a new command qc can be issued.

LOCKING

spin_lock_irqsave(host lock)

RETURNS

ATA_DEFER_* if deferring is needed, 0 otherwise.

AUTHOR

Jeff Garzik

Author.