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ide: add ide_pad_transfer() helper

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* Add ide_pad_transfer() helper (which uses ->{in,out}put_data methods
  internally so the transfer is also padded to drive+host requirements)
  and use it instead of ide_atapi_{write_zeros,discard_data}().

* Remove no longer needed ide_atapi_{write_zeros,discard_data}().

Cc: Borislav Petkov <petkovbb@gmail.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-04-28 23:44:41 +02:00
parent 7c0daf2681
commit 9f87abe892
5 changed files with 24 additions and 33 deletions
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7
drivers/ide/ide-floppy.c
View file

@ -262,10 +262,7 @@ static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
if (bcount) {
printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
drive->name, __func__, bcount);
if (direction)
ide_atapi_write_zeros(drive, bcount);
else
ide_atapi_discard_data(drive, bcount);
ide_pad_transfer(drive, direction, bcount);
}
}
@ -491,7 +488,7 @@ 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");
ide_atapi_discard_data(drive, bcount);
ide_pad_transfer(drive, 0, bcount);
ide_set_handler(drive,
&idefloppy_pc_intr,

15
drivers/ide/ide-io.c
View file

@ -1642,3 +1642,18 @@ void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount, u8 dma)
}
EXPORT_SYMBOL_GPL(ide_pktcmd_tf_load);
void ide_pad_transfer(ide_drive_t *drive, int write, int len)
{
ide_hwif_t *hwif = drive->hwif;
u8 buf[4] = { 0 };
while (len > 0) {
if (write)
hwif->output_data(drive, NULL, buf, min(4, len));
else
hwif->input_data(drive, NULL, buf, min(4, len));
len -= 4;
}
}
EXPORT_SYMBOL_GPL(ide_pad_transfer);

4
drivers/ide/ide-tape.c
View file

@ -395,7 +395,7 @@ static void idetape_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
if (bh == NULL) {
printk(KERN_ERR "ide-tape: bh == NULL in "
"idetape_input_buffers\n");
ide_atapi_discard_data(drive, bcount);
ide_pad_transfer(drive, 0, bcount);
return;
}
count = min(
@ -871,7 +871,7 @@ 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");
ide_atapi_discard_data(drive, bcount);
ide_pad_transfer(drive, 0, bcount);
ide_set_handler(drive, &idetape_pc_intr,
IDETAPE_WAIT_CMD, NULL);
return ide_started;

6
drivers/scsi/ide-scsi.c
View file

@ -164,7 +164,7 @@ static void idescsi_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
if (bcount) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n");
ide_atapi_discard_data(drive, bcount);
ide_pad_transfer(drive, 0, bcount);
}
}
@ -201,7 +201,7 @@ static void idescsi_output_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
if (bcount) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n");
ide_atapi_write_zeros(drive, bcount);
ide_pad_transfer(drive, 1, bcount);
}
}
@ -438,7 +438,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
}
pc->xferred += temp;
pc->cur_pos += temp;
ide_atapi_discard_data(drive, bcount - temp);
ide_pad_transfer(drive, 0, bcount - temp);
ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
return ide_started;
}

25
include/linux/ide.h
View file

@ -827,6 +827,8 @@ void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
void ide_execute_pkt_cmd(ide_drive_t *);
void ide_pad_transfer(ide_drive_t *, int, int);
ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
@ -1359,27 +1361,4 @@ static inline u8 ide_read_error(ide_drive_t *drive)
return hwif->INB(hwif->io_ports.error_addr);
}
/*
* 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 ->input_data */
while (bcount--)
(void)hwif->INB(hwif->io_ports.data_addr);
}
static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount)
{
ide_hwif_t *hwif = drive->hwif;
/* FIXME: use ->output_data */
while (bcount--)
hwif->OUTB(0, hwif->io_ports.data_addr);
}
#endif /* _IDE_H */