From 74e6c8c394ca2126a60e97bc1142ec2d91761e9a Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 2 Apr 2006 18:51:53 +0900 Subject: [PATCH] [PATCH] libata: don't read TF directly from sense generation functions TF register might not be directly accessible depending on errors. e.g. TF of failed NCQ command is in log page 10h. Make reading TF responsibility of error handlers. For the current EH, simply push TF reading into qc completion functions as they are practically part of EH. New EH will fill qc->tf with status registers before complting qcs. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/scsi/libata-scsi.c | 27 +++++++++------------------ 1 file changed, 9 insertions(+), 18 deletions(-) diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index ec628cea386..28706521773 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -545,12 +545,6 @@ void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; - /* - * Read the controller registers. - */ - WARN_ON(qc->ap->ops->tf_read == NULL); - qc->ap->ops->tf_read(qc->ap, tf); - /* * Use ata_to_sense_error() to map status register bits * onto sense key, asc & ascq. @@ -621,12 +615,6 @@ void ata_gen_fixed_sense(struct ata_queued_cmd *qc) cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; - /* - * Read the controller registers. - */ - WARN_ON(qc->ap->ops->tf_read == NULL); - qc->ap->ops->tf_read(qc->ap, tf); - /* * Use ata_to_sense_error() to map status register bits * onto sense key, asc & ascq. @@ -1337,11 +1325,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) */ if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && ((cdb[2] & 0x20) || need_sense)) { + qc->ap->ops->tf_read(qc->ap, &qc->tf); ata_gen_ata_desc_sense(qc); } else { if (!need_sense) { cmd->result = SAM_STAT_GOOD; } else { + qc->ap->ops->tf_read(qc->ap, &qc->tf); + /* TODO: decide which descriptor format to use * for 48b LBA devices and call that here * instead of the fixed desc, which is only @@ -2133,13 +2124,15 @@ void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 static void atapi_sense_complete(struct ata_queued_cmd *qc) { - if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) + if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { /* FIXME: not quite right; we don't want the * translation of taskfile registers into * a sense descriptors, since that's only * correct for ATA, not ATAPI */ + qc->ap->ops->tf_read(qc->ap, &qc->tf); ata_gen_ata_desc_sense(qc); + } qc->scsidone(qc->scsicmd); ata_qc_free(qc); @@ -2207,17 +2200,15 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc) cmd->result = SAM_STAT_CHECK_CONDITION; atapi_request_sense(qc); return; - } - - else if (unlikely(err_mask)) + } else if (unlikely(err_mask)) { /* FIXME: not quite right; we don't want the * translation of taskfile registers into * a sense descriptors, since that's only * correct for ATA, not ATAPI */ + qc->ap->ops->tf_read(qc->ap, &qc->tf); ata_gen_ata_desc_sense(qc); - - else { + } else { u8 *scsicmd = cmd->cmnd; if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { -- 2.20.1