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Date: Sat, 9 Feb 2008 16:23:52 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-kernel@...r.kernel.org
Cc: linux-ide@...r.kernel.org, Borislav Petkov <petkovbb@...il.com>
Subject: [PATCH 2/3] 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@...il.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
drivers/ide/ide-floppy.c | 24 +++---------------------
drivers/ide/ide-tape.c | 14 ++------------
drivers/scsi/ide-scsi.c | 18 +++---------------
include/linux/ide.h | 22 ++++++++++++++++++++++
4 files changed, 30 insertions(+), 48 deletions(-)
Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -230,23 +230,6 @@ static void ide_floppy_put(struct ide_fl
}
/*
- * 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_dr
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
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,
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -518,16 +518,6 @@ static struct ide_tape_obj *ide_tape_chr
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_dr
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(i
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;
Index: b/drivers/scsi/ide-scsi.c
===================================================================
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -152,18 +152,6 @@ static inline idescsi_scsi_t *drive_to_i
*/
#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_d
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_
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 (
}
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;
}
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1299,4 +1299,26 @@ static inline u8 ide_read_error(ide_driv
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 */
--
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