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[PATCH] sata_sil24: update TF image only when necessary 

Update TF image (pp->tf) only when necessary.

Signed-off-by: Tejun Heo <htejun@gmail.com>
This commit is contained in:
Tejun Heo 2006-05-15 20:57:42 +09:00
parent e61e067227
commit ce5f7f3d0c
1 changed files with 2 additions and 10 deletions
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12
drivers/scsi/sata_sil24.c
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@ -799,17 +799,9 @@ static inline void sil24_host_intr(struct ata_port *ap)
if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
/*
* !HOST_SSAT_ATTN guarantees successful completion,
* so reading back tf registers is unnecessary for
* most commands. TODO: read tf registers for
* commands which require these values on successful
* completion (EXECUTE DEVICE DIAGNOSTIC, CHECK POWER,
* DEVICE RESET and READ PORT MULTIPLIER (any more?).
*/
sil24_update_tf(ap);
if (qc) {
if (qc->flags & ATA_QCFLAG_RESULT_TF)
sil24_update_tf(ap);
qc->err_mask |= ac_err_mask(pp->tf.command);
ata_qc_complete(qc);
}