From ce5f7f3d0cab82d6c16fcb64def8bfc0a3a85dd6 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 15 May 2006 20:57:42 +0900 Subject: [PATCH] [PATCH] sata_sil24: update TF image only when necessary Update TF image (pp->tf) only when necessary. Signed-off-by: Tejun Heo --- drivers/scsi/sata_sil24.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 8c167250f4c9..45b9e37c191e 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -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); } -- 2.20.1