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| author | Tejun Heo <htejun@gmail.com> | 2008-04-07 22:47:20 +0900 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-04-17 15:44:23 -0400 |
| commit | 22183bf569c8600ff414ac25f23134044e0ef453 (patch) | |
| tree | 1dea79cdbe439637477e1c4214b600b6823cb866 /drivers/scsi/libsas | |
| parent | 305d2a1ab137d11d573319c315748a87060fe82d (diff) | |
| download | lwn-22183bf569c8600ff414ac25f23134044e0ef453.tar.gz lwn-22183bf569c8600ff414ac25f23134044e0ef453.zip | |
libata: add qc_fill_rtf port operation
On command completion, ata_qc_complete() directly called ops->tf_read
to fill qc->result_tf. This patch adds ops->qc_fill_rtf to replace
hardcoded ops->tf_read usage.
ata_sff_qc_fill_rtf() which uses ops->tf_read to fill result_tf is
implemented and set in ata_base_port_ops and other ops tables which
don't inherit from ata_base_port_ops, so this patch doesn't introduce
any behavior change.
ops->qc_fill_rtf() is similar to ops->sff_tf_read() but can only be
called when a command finishes. As some non-SFF controllers don't
have TF registers defined unless they're associated with in-flight
commands, this limited operation makes life easier for those drivers
and help lifting SFF assumptions from libata core layer.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Diffstat (limited to 'drivers/scsi/libsas')
| -rw-r--r-- | drivers/scsi/libsas/sas_ata.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index a1664b87927a..2ec255839dcd 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -356,6 +356,7 @@ static struct ata_port_operations sas_sata_ops = { .sff_tf_read = sas_ata_tf_read, .qc_prep = ata_noop_qc_prep, .qc_issue = sas_ata_qc_issue, + .qc_fill_rtf = ata_sff_qc_fill_rtf, .port_start = ata_sas_port_start, .port_stop = ata_sas_port_stop, .scr_read = sas_ata_scr_read, |