From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] ide: keep track of number of bytes instead of sectors in struct ide_cmd
* Pass number of bytes instead of sectors to ide_init_sg_cmd().
* Pass number of bytes to process to ide_pio_sector() and rename
it to ide_pio_bytes().
* Rename ->nsect field to ->nbytes in struct ide_cmd and use
->nbytes, ->nleft and ->cursg_ofs to keep track of number of
bytes instead of sectors.
There should be no functional changes caused by this patch.
Cc: Borislav Petkov <petkovbb@xxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/ide-disk.c | 4 ++--
drivers/ide/ide-floppy.c | 2 +-
drivers/ide/ide-io.c | 6 +++---
drivers/ide/ide-taskfile.c | 32 ++++++++++++++++----------------
include/linux/ide.h | 4 ++--
5 files changed, 24 insertions(+), 24 deletions(-)
Index: b/drivers/ide/ide-disk.c
===================================================================
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -152,7 +152,7 @@ static ide_startstop_t __ide_do_rw_disk(
cmd.rq = rq;
if (dma == 0) {
- ide_init_sg_cmd(&cmd, nsectors);
+ ide_init_sg_cmd(&cmd, nsectors << 9);
ide_map_sg(drive, &cmd);
}
@@ -162,7 +162,7 @@ static ide_startstop_t __ide_do_rw_disk(
/* fallback to PIO */
cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
ide_tf_set_cmd(drive, &cmd, 0);
- ide_init_sg_cmd(&cmd, nsectors);
+ ide_init_sg_cmd(&cmd, nsectors << 9);
rc = do_rw_taskfile(drive, &cmd);
}
Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -293,7 +293,7 @@ static ide_startstop_t ide_floppy_do_req
cmd.rq = rq;
- ide_init_sg_cmd(&cmd, rq->nr_sectors);
+ ide_init_sg_cmd(&cmd, rq->nr_sectors << 9);
ide_map_sg(drive, &cmd);
pc->sg = hwif->sg_table;
Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -241,9 +241,9 @@ void ide_map_sg(ide_drive_t *drive, stru
}
EXPORT_SYMBOL_GPL(ide_map_sg);
-void ide_init_sg_cmd(struct ide_cmd *cmd, int nsect)
+void ide_init_sg_cmd(struct ide_cmd *cmd, unsigned int nr_bytes)
{
- cmd->nsect = cmd->nleft = nsect;
+ cmd->nbytes = cmd->nleft = nr_bytes;
cmd->cursg_ofs = 0;
cmd->cursg = NULL;
}
@@ -268,7 +268,7 @@ static ide_startstop_t execute_drive_cmd
if (cmd) {
if (cmd->protocol == ATA_PROT_PIO) {
- ide_init_sg_cmd(cmd, rq->nr_sectors);
+ ide_init_sg_cmd(cmd, rq->nr_sectors << 9);
ide_map_sg(drive, cmd);
}
Index: b/drivers/ide/ide-taskfile.c
===================================================================
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -188,8 +188,8 @@ static u8 wait_drive_not_busy(ide_drive_
return stat;
}
-static void ide_pio_sector(ide_drive_t *drive, struct ide_cmd *cmd,
- unsigned int write)
+static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
+ unsigned int write, unsigned int nr_bytes)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
@@ -208,7 +208,7 @@ static void ide_pio_sector(ide_drive_t *
}
page = sg_page(cursg);
- offset = cursg->offset + cmd->cursg_ofs * SECTOR_SIZE;
+ offset = cursg->offset + cmd->cursg_ofs;
/* get the current page and offset */
page = nth_page(page, (offset >> PAGE_SHIFT));
@@ -219,19 +219,19 @@ static void ide_pio_sector(ide_drive_t *
#endif
buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
- cmd->nleft--;
- cmd->cursg_ofs++;
+ cmd->nleft -= nr_bytes;
+ cmd->cursg_ofs += nr_bytes;
- if ((cmd->cursg_ofs * SECTOR_SIZE) == cursg->length) {
+ if (cmd->cursg_ofs == cursg->length) {
cmd->cursg = sg_next(cmd->cursg);
cmd->cursg_ofs = 0;
}
/* do the actual data transfer */
if (write)
- hwif->tp_ops->output_data(drive, cmd, buf, SECTOR_SIZE);
+ hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
else
- hwif->tp_ops->input_data(drive, cmd, buf, SECTOR_SIZE);
+ hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
kunmap_atomic(buf, KM_BIO_SRC_IRQ);
#ifdef CONFIG_HIGHMEM
@@ -244,9 +244,9 @@ static void ide_pio_multi(ide_drive_t *d
{
unsigned int nsect;
- nsect = min_t(unsigned int, cmd->nleft, drive->mult_count);
+ nsect = min_t(unsigned int, cmd->nleft >> 9, drive->mult_count);
while (nsect--)
- ide_pio_sector(drive, cmd, write);
+ ide_pio_bytes(drive, cmd, write, SECTOR_SIZE);
}
static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
@@ -265,7 +265,7 @@ static void ide_pio_datablock(ide_drive_
if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
ide_pio_multi(drive, cmd, write);
else
- ide_pio_sector(drive, cmd, write);
+ ide_pio_bytes(drive, cmd, write, SECTOR_SIZE);
drive->io_32bit = saved_io_32bit;
}
@@ -273,18 +273,18 @@ static void ide_pio_datablock(ide_drive_
static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
{
if (cmd->tf_flags & IDE_TFLAG_FS) {
- int sectors = cmd->nsect - cmd->nleft;
+ int nr_bytes = cmd->nbytes - cmd->nleft;
if (cmd->protocol == ATA_PROT_PIO &&
((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
- sectors -= drive->mult_count;
+ nr_bytes -= drive->mult_count << 9;
else
- sectors--;
+ nr_bytes -= SECTOR_SIZE;
}
- if (sectors > 0)
- ide_complete_rq(drive, 0, sectors << 9);
+ if (nr_bytes > 0)
+ ide_complete_rq(drive, 0, nr_bytes);
}
}
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -349,7 +349,7 @@ struct ide_cmd {
int sg_nents; /* number of sg entries */
int sg_dma_direction; /* DMA transfer direction */
- unsigned int nsect;
+ unsigned int nbytes;
unsigned int nleft;
struct scatterlist *cursg;
unsigned int cursg_ofs;
@@ -1406,7 +1406,7 @@ int ide_pci_resume(struct pci_dev *);
#endif
void ide_map_sg(ide_drive_t *, struct ide_cmd *);
-void ide_init_sg_cmd(struct ide_cmd *, int);
+void ide_init_sg_cmd(struct ide_cmd *, unsigned int);
#define BAD_DMA_DRIVE 0
#define GOOD_DMA_DRIVE 1
--
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