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authorTejun Heo <htejun@gmail.com>2007-01-03 17:30:39 +0900
committerJeff Garzik <jeff@garzik.org>2007-02-09 17:39:31 -0500
commit726f0785b608d09bdd64bdbadc09217ebbf9920e (patch)
treecefc97e9d5fefb2735b1b7a5ca22d3b3cc742b13 /drivers
parent16454445e1f0ca21ca2f29accb58478a7ff765a2 (diff)
libata: kill qc->nsect and cursect
libata used two separate sets of variables to record request size and current offset for ATA and ATAPI. This is confusing and fragile. This patch replaces qc->nsect/cursect with qc->nbytes/curbytes and kills them. Also, ata_pio_sector() is updated to use bytes for qc->cursg_ofs instead of sectors. The field used to be used in bytes for ATAPI and in sectors for ATA. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/libata-core.c14
-rw-r--r--drivers/ata/libata-eh.c7
-rw-r--r--drivers/ata/libata-scsi.c4
-rw-r--r--drivers/ata/pata_pdc202xx_old.c5
-rw-r--r--drivers/ata/sata_qstor.c2
5 files changed, 12 insertions, 20 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 89f3cf57b677..c1444d8f92c6 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1249,7 +1249,6 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
buflen += sg[i].length;
ata_sg_init(qc, sg, n_elem);
- qc->nsect = buflen / ATA_SECT_SIZE;
qc->nbytes = buflen;
}
@@ -4006,11 +4005,11 @@ static void ata_pio_sector(struct ata_queued_cmd *qc)
unsigned int offset;
unsigned char *buf;
- if (qc->cursect == (qc->nsect - 1))
+ if (qc->curbytes == qc->nbytes - ATA_SECT_SIZE)
ap->hsm_task_state = HSM_ST_LAST;
page = sg[qc->cursg].page;
- offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
+ offset = sg[qc->cursg].offset + qc->cursg_ofs;
/* get the current page and offset */
page = nth_page(page, (offset >> PAGE_SHIFT));
@@ -4035,10 +4034,10 @@ static void ata_pio_sector(struct ata_queued_cmd *qc)
ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
}
- qc->cursect++;
- qc->cursg_ofs++;
+ qc->curbytes += ATA_SECT_SIZE;
+ qc->cursg_ofs += ATA_SECT_SIZE;
- if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
+ if (qc->cursg_ofs == (&sg[qc->cursg])->length) {
qc->cursg++;
qc->cursg_ofs = 0;
}
@@ -4063,7 +4062,8 @@ static void ata_pio_sectors(struct ata_queued_cmd *qc)
WARN_ON(qc->dev->multi_count == 0);
- nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
+ nsect = min((qc->nbytes - qc->curbytes) / ATA_SECT_SIZE,
+ qc->dev->multi_count);
while (nsect--)
ata_pio_sector(qc);
} else
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 748435807d68..52c85af7fe99 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1443,15 +1443,10 @@ static void ata_eh_report(struct ata_port *ap)
};
struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf;
- unsigned int nbytes;
if (!(qc->flags & ATA_QCFLAG_FAILED) || !qc->err_mask)
continue;
- nbytes = qc->nbytes;
- if (!nbytes)
- nbytes = qc->nsect << 9;
-
ata_dev_printk(qc->dev, KERN_ERR,
"cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x "
"tag %d cdb 0x%x data %u %s\n "
@@ -1461,7 +1456,7 @@ static void ata_eh_report(struct ata_port *ap)
cmd->lbal, cmd->lbam, cmd->lbah,
cmd->hob_feature, cmd->hob_nsect,
cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah,
- cmd->device, qc->tag, qc->cdb[0], nbytes,
+ cmd->device, qc->tag, qc->cdb[0], qc->nbytes,
dma_str[qc->dma_dir],
res->command, res->feature, res->nsect,
res->lbal, res->lbam, res->lbah,
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 6a99c0824751..9b5088ab2742 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1359,7 +1359,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
goto nothing_to_do;
qc->flags |= ATA_QCFLAG_IO;
- qc->nsect = n_block;
+ qc->nbytes = n_block * ATA_SECT_SIZE;
rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
qc->tag);
@@ -2660,7 +2660,7 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
* TODO: find out if we need to do more here to
* cover scatter/gather case.
*/
- qc->nsect = scmd->request_bufflen / ATA_SECT_SIZE;
+ qc->nbytes = scmd->request_bufflen;
/* request result TF */
qc->flags |= ATA_QCFLAG_RESULT_TF;
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index ad691b9e7743..ba982ba68ad5 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -189,10 +189,7 @@ static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
/* Cases the state machine will not complete correctly without help */
if ((tf->flags & ATA_TFLAG_LBA48) || tf->protocol == ATA_PROT_ATAPI_DMA)
{
- if (tf->flags & ATA_TFLAG_LBA48)
- len = qc->nsect * 512;
- else
- len = qc->nbytes;
+ len = qc->nbytes;
if (tf->flags & ATA_TFLAG_WRITE)
len |= 0x06000000;
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 710909df4eaf..0292a79f9747 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -325,7 +325,7 @@ static void qs_qc_prep(struct ata_queued_cmd *qc)
/* host control block (HCB) */
buf[ 0] = QS_HCB_HDR;
buf[ 1] = hflags;
- *(__le32 *)(&buf[ 4]) = cpu_to_le32(qc->nsect * ATA_SECT_SIZE);
+ *(__le32 *)(&buf[ 4]) = cpu_to_le32(qc->nbytes);
*(__le32 *)(&buf[ 8]) = cpu_to_le32(nelem);
addr = ((u64)pp->pkt_dma) + QS_CPB_BYTES;
*(__le64 *)(&buf[16]) = cpu_to_le64(addr);

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