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ide: add ide_read_bcount_and_ireason() helper

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Add ide_read_bcount_and_ireason() helper and use it instead of ->INB
in {cdrom_newpc,ide_pc}_intr().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-07-23 19:55:54 +02:00
parent 88a72109b2
commit 1823649b5a
4 changed files with 22 additions and 12 deletions
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6
drivers/ide/ide-atapi.c
View File

@ -107,11 +107,9 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
ide_dma_off(drive);
return ide_do_reset(drive);
}
/* Get the number of bytes to transfer on this interrupt. */
bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
hwif->INB(hwif->io_ports.lbam_addr);
ireason = hwif->INB(hwif->io_ports.nsect_addr);
/* Get the number of bytes to transfer on this interrupt. */
ide_read_bcount_and_ireason(drive, &bcount, &ireason);
if (ireason & CD) {
printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);

12
drivers/ide/ide-cd.c
View File

@ -895,10 +895,11 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
struct request *rq = HWGROUP(drive)->rq;
xfer_func_t *xferfunc;
ide_expiry_t *expiry = NULL;
int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
int dma_error = 0, dma, stat, thislen, uptodate = 0;
int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
unsigned int timeout;
u8 lowcyl, highcyl;
u16 len;
u8 ireason;
/* check for errors */
dma = info->dma;
@ -926,12 +927,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
goto end_request;
}
/* ok we fall to pio :/ */
ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3;
lowcyl = hwif->INB(hwif->io_ports.lbam_addr);
highcyl = hwif->INB(hwif->io_ports.lbah_addr);
len = lowcyl + (256 * highcyl);
ide_read_bcount_and_ireason(drive, &len, &ireason);
thislen = blk_fs_request(rq) ? len : rq->data_len;
if (thislen > len)

15
drivers/ide/ide-iops.c
View File

@ -405,6 +405,21 @@ u8 ide_read_error(ide_drive_t *drive)
}
EXPORT_SYMBOL_GPL(ide_read_error);
void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
{
ide_task_t task;
memset(&task, 0, sizeof(task));
task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
IDE_TFLAG_IN_NSECT;
drive->hwif->tf_read(drive, &task);
*bcount = (task.tf.lbah << 8) | task.tf.lbam;
*ireason = task.tf.nsect & 3;
}
EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
void ide_fix_driveid (struct hd_driveid *id)
{
#ifndef __LITTLE_ENDIAN

1
include/linux/ide.h
View File

@ -958,6 +958,7 @@ extern void SELECT_DRIVE(ide_drive_t *);
void SELECT_MASK(ide_drive_t *, int);
u8 ide_read_error(ide_drive_t *);
void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
extern int drive_is_ready(ide_drive_t *);