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Subject[PATCH 13/15] ide-atapi: remove pc->buf
Date
Now after all users of pc->buf have been converted, remove the 64B buffer
embedded in each packet command.

There should be no functional change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
drivers/ide/ide-atapi.c | 6 ------
drivers/ide/ide-floppy.c | 8 +-------
drivers/ide/ide-floppy_ioctl.c | 1 -
drivers/ide/ide-tape.c | 7 ++-----
include/linux/ide.h | 11 -----------
5 files changed, 3 insertions(+), 30 deletions(-)

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 66ea1e7..3075b04 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -74,8 +74,6 @@ EXPORT_SYMBOL_GPL(ide_check_atapi_device);
void ide_init_pc(struct ide_atapi_pc *pc)
{
memset(pc, 0, sizeof(*pc));
- pc->buf = pc->pc_buf;
- pc->buf_size = IDE_PC_BUFFER_SIZE;
}
EXPORT_SYMBOL_GPL(ide_init_pc);

@@ -254,10 +252,6 @@ void ide_retry_pc(ide_drive_t *drive)
ide_init_pc(pc);
memcpy(pc->c, sense_rq->cmd, 12);

- /* pointer to mapped address */
- pc->buf = bio_data(sense_rq->bio);
- pc->req_xfer = blk_rq_bytes(sense_rq);
-
if (drive->media == ide_tape)
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 14e5e9c..800c83a 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -210,8 +210,7 @@ static void idefloppy_create_rw_cmd(ide_drive_t *drive,
pc->rq = rq;
if (rq->cmd_flags & REQ_RW)
pc->flags |= PC_FLAG_WRITING;
- pc->buf = NULL;
- pc->buf_size = blk_rq_bytes(rq);
+
pc->flags |= PC_FLAG_DMA_OK;
}

@@ -226,9 +225,6 @@ static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
if (rq_data_dir(rq) == WRITE)
pc->flags |= PC_FLAG_WRITING;
}
- /* pio will be performed by ide_pio_bytes() which handles sg fine */
- pc->buf = NULL;
- pc->buf_size = blk_rq_bytes(rq);
}

static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
@@ -388,8 +384,6 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
drive->capacity64 = 0;

ide_floppy_create_read_capacity_cmd(&pc);
- pc.buf_size = sizeof(pc_buf);
-
if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
printk(KERN_ERR PFX "Can't get floppy parameters\n");
return 1;
diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c
index 3a1f9b5..9c22882 100644
--- a/drivers/ide/ide-floppy_ioctl.c
+++ b/drivers/ide/ide-floppy_ioctl.c
@@ -47,7 +47,6 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive,
return -EINVAL;

ide_floppy_create_read_capacity_cmd(pc);
- pc->buf_size = sizeof(pc_buf);

if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) {
printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index ead2734..9ca2665 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -568,9 +568,8 @@ static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
ide_init_pc(pc);
put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
pc->c[1] = 1;
- pc->buf = NULL;
- pc->buf_size = blk_rq_bytes(rq);
- if (pc->buf_size == tape->buffer_size)
+
+ if (blk_rq_bytes(rq) == tape->buffer_size)
pc->flags |= PC_FLAG_DMA_OK;

if (opcode == READ_6)
@@ -1608,8 +1607,6 @@ static void idetape_get_inquiry_results(ide_drive_t *drive)
char fw_rev[4], vendor_id[8], product_id[16];

idetape_create_inquiry_cmd(&pc);
- pc.buf_size = sizeof(pc_buf);
-
if (ide_queue_pc_tail(drive, tape->disk, &pc, pc_buf, pc.req_xfer)) {
printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
tape->name);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 4cd7157..59aedcd 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -341,11 +341,6 @@ enum {
PC_FLAG_WRITING = (1 << 6),
};

-/*
- * With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
- * This is used for several packet commands (not for READ/WRITE commands).
- */
-#define IDE_PC_BUFFER_SIZE 64
#define ATAPI_WAIT_PC (60 * HZ)

struct ide_atapi_pc {
@@ -358,10 +353,6 @@ struct ide_atapi_pc {
/* bytes to transfer */
int req_xfer;

- /* data buffer */
- u8 *buf;
- int buf_size;
-
/* the corresponding request */
struct request *rq;

@@ -371,8 +362,6 @@ struct ide_atapi_pc {
* those are more or less driver-specific and some of them are subject
* to change/removal later.
*/
- u8 pc_buf[IDE_PC_BUFFER_SIZE];
-
unsigned long timeout;
};

--
1.6.3


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