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ide-atapi: add a buffer-arg to ide_queue_pc_tail

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This is in preparation of removing ide_atapi_pc. Expose the buffer as an
argument to ide_queue_pc_tail with later replacing it with local buffer
or even kmalloc'ed one if needed due to stack usage constraints.

Also, add the possibility of passing a NULL-ptr buffer for cmds which
don't transfer data besides the cdb. While at it, switch to local buffer
in idetape_get_mode_sense_results().

There should be no functional change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
This commit is contained in:
Borislav Petkov
2009-05-02 10:26:12 +02:00
parent 5a0e43b5e2
commit b13345f39d
5 changed files with 41 additions and 43 deletions
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drivers/ide/ide-floppy.c
+8 -9
View File
@@ -318,7 +318,7 @@ static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
if (ide_queue_pc_tail(drive, disk, pc, pc->req_xfer)) {
if (ide_queue_pc_tail(drive, disk, pc, pc->buf, pc->req_xfer)) {
printk(KERN_ERR PFX "Can't get flexible disk page params\n");
return 1;
}
@@ -387,22 +387,21 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
drive->capacity64 = 0;
ide_floppy_create_read_capacity_cmd(&pc);
pc.buf = &pc_buf[0];
pc.buf_size = sizeof(pc_buf);
if (ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer)) {
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;
}
header_len = pc.buf[3];
cap_desc = &pc.buf[4];
header_len = pc_buf[3];
cap_desc = &pc_buf[4];
desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
for (i = 0; i < desc_cnt; i++) {
unsigned int desc_start = 4 + i*8;
blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
"%d sector size",
@@ -415,7 +414,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
* the code below is valid only for the 1st descriptor, ie i=0
*/
switch (pc.buf[desc_start + 4] & 0x03) {
switch (pc_buf[desc_start + 4] & 0x03) {
/* Clik! drive returns this instead of CAPACITY_CURRENT */
case CAPACITY_UNFORMATTED:
if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
@@ -464,7 +463,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
break;
}
ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
pc.buf[desc_start + 4] & 0x03);
pc_buf[desc_start + 4] & 0x03);
}
/* Clik! disk does not support get_flexible_disk_page */