diff options
Diffstat (limited to 'drivers/ata/libata-core.c')
| -rw-r--r-- | drivers/ata/libata-core.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 4012b33e8b8..92cd5f375b8 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4943,8 +4943,13 @@ static void ata_verify_xfer(struct ata_queued_cmd *qc) * ata_qc_complete - Complete an active ATA command * @qc: Command to complete * - * Indicate to the mid and upper layers that an ATA - * command has completed, with either an ok or not-ok status. + * Indicate to the mid and upper layers that an ATA command has + * completed, with either an ok or not-ok status. + * + * Refrain from calling this function multiple times when + * successfully completing multiple NCQ commands. + * ata_qc_complete_multiple() should be used instead, which will + * properly update IRQ expect state. * * LOCKING: * spin_lock_irqsave(host lock) @@ -5037,6 +5042,10 @@ void ata_qc_complete(struct ata_queued_cmd *qc) * requests normally. ap->qc_active and @qc_active is compared * and commands are completed accordingly. * + * Always use this function when completing multiple NCQ commands + * from IRQ handlers instead of calling ata_qc_complete() + * multiple times to keep IRQ expect status properly in sync. + * * LOCKING: * spin_lock_irqsave(host lock) * |