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ide: add ide_atapi_{discard_data,write_zeros} inline helpers 

Add ide_atapi_{discard_data,write_zeros} inline helpers to <linux/ide.h>
and use them instead of home-brewn helpers in ide-{floppy,tape,scsi}.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-04-18 00:46:26 +02:00
parent 3ad6776cca
commit 7616c0ad20
4 changed files with 30 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/ide/ide-floppy.c
View File

@ -229,23 +229,6 @@ static void ide_floppy_put(struct ide_floppy_obj *floppy)
mutex_unlock(&idefloppy_ref_mutex);
}
/*
* Too bad. The drive wants to send us data which we are not ready to accept.
* Just throw it away.
*/
static void idefloppy_discard_data(ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
(void) HWIF(drive)->INB(IDE_DATA_REG);
}
static void idefloppy_write_zeros(ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
HWIF(drive)->OUTB(0, IDE_DATA_REG);
}
/*
* Used to finish servicing a request. For read/write requests, we will call
* ide_end_request to pass to the next buffer.
@ -313,10 +296,9 @@ static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
drive->name, __func__, bcount);
if (direction)
idefloppy_write_zeros(drive, bcount);
ide_atapi_write_zeros(drive, bcount);
else
idefloppy_discard_data(drive, bcount);
ide_atapi_discard_data(drive, bcount);
}
}
@ -541,7 +523,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
printk(KERN_ERR "ide-floppy: The floppy wants "
"to send us more data than expected "
"- discarding data\n");
idefloppy_discard_data(drive, bcount);
ide_atapi_discard_data(drive, bcount);
ide_set_handler(drive,
&idefloppy_pc_intr,

14
drivers/ide/ide-tape.c
View File

@ -518,16 +518,6 @@ static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i)
return tape;
}
/*
* Too bad. The drive wants to send us data which we are not ready to accept.
* Just throw it away.
*/
static void idetape_discard_data(ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
(void) HWIF(drive)->INB(IDE_DATA_REG);
}
static void idetape_input_buffers(ide_drive_t *drive, idetape_pc_t *pc,
unsigned int bcount)
{
@ -538,7 +528,7 @@ static void idetape_input_buffers(ide_drive_t *drive, idetape_pc_t *pc,
if (bh == NULL) {
printk(KERN_ERR "ide-tape: bh == NULL in "
"idetape_input_buffers\n");
idetape_discard_data(drive, bcount);
ide_atapi_discard_data(drive, bcount);
return;
}
count = min(
@ -1152,7 +1142,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
printk(KERN_ERR "ide-tape: The tape wants to "
"send us more data than expected "
"- discarding data\n");
idetape_discard_data(drive, bcount);
ide_atapi_discard_data(drive, bcount);
ide_set_handler(drive, &idetape_pc_intr,
IDETAPE_WAIT_CMD, NULL);
return ide_started;

18
drivers/scsi/ide-scsi.c
View File

@ -152,18 +152,6 @@ static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
*/
#define IDESCSI_PC_RQ 90
static void idescsi_discard_data (ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
(void) HWIF(drive)->INB(IDE_DATA_REG);
}
static void idescsi_output_zeros (ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
HWIF(drive)->OUTB(0, IDE_DATA_REG);
}
/*
* PIO data transfer routines using the scatter gather table.
*/
@ -200,7 +188,7 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne
if (bcount) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n");
idescsi_discard_data (drive, bcount);
ide_atapi_discard_data(drive, bcount);
}
}
@ -237,7 +225,7 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign
if (bcount) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n");
idescsi_output_zeros (drive, bcount);
ide_atapi_write_zeros(drive, bcount);
}
}
@ -463,7 +451,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
}
pc->actually_transferred += temp;
pc->current_position += temp;
idescsi_discard_data(drive, bcount - temp);
ide_atapi_discard_data(drive, bcount - temp);
ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
return ide_started;
}

22
include/linux/ide.h
View File

@ -1297,4 +1297,26 @@ static inline u8 ide_read_error(ide_drive_t *drive)
return hwif->INB(hwif->io_ports[IDE_ERROR_OFFSET]);
}
/*
* Too bad. The drive wants to send us data which we are not ready to accept.
* Just throw it away.
*/
static inline void ide_atapi_discard_data(ide_drive_t *drive, unsigned bcount)
{
ide_hwif_t *hwif = drive->hwif;
/* FIXME: use ->atapi_input_bytes */
while (bcount--)
(void)hwif->INB(hwif->io_ports[IDE_DATA_OFFSET]);
}
static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount)
{
ide_hwif_t *hwif = drive->hwif;
/* FIXME: use ->atapi_output_bytes */
while (bcount--)
hwif->OUTB(0, hwif->io_ports[IDE_DATA_OFFSET]);
}
#endif /* _IDE_H */