libata: fix ata_scsi_change_queue_depth()

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Fix ata_scsi_change_queue_depth() such that...

* NCQ on/off is exactly determined using the same logic as the issue path.

* queue depth is adjusted to 1 if NCQ is not enabled.

* -EINVAL is returned if requested action is ignored due to limitations.

This fixes the bug which allows queue depth to be increased on
blacklisted NCQ hosts/devices.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

...

This commit is contained in:

Tejun Heo 2007-02-20 23:31:22 +09:00 • committed by Jeff Garzik

parent fcf1bf1584

commit c3c70c443c

1 changed files with 15 additions and 12 deletions

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drivers/ata/libata-scsi.c

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