lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ide-atapi: add a buffer-arg to ide_queue_pc_tail

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

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

@ -84,7 +84,7 @@ EXPORT_SYMBOL_GPL(ide_init_pc);
* and wait for it to be serviced.
*/
int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
struct ide_atapi_pc *pc, unsigned int bufflen)
struct ide_atapi_pc *pc, void *buf, unsigned int bufflen)
{
struct request *rq;
int error;
@ -93,8 +93,8 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->special = (char *)pc;
if (bufflen) {
error = blk_rq_map_kern(drive->queue, rq, pc->buf, bufflen,
if (buf && bufflen) {
error = blk_rq_map_kern(drive->queue, rq, buf, bufflen,
GFP_NOIO);
if (error)
goto put_req;
@ -117,7 +117,7 @@ int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk)
ide_init_pc(&pc);
pc.c[0] = TEST_UNIT_READY;
return ide_queue_pc_tail(drive, disk, &pc, 0);
return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
}
EXPORT_SYMBOL_GPL(ide_do_test_unit_ready);
@ -132,7 +132,7 @@ int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start)
if (drive->media == ide_tape)
pc.flags |= PC_FLAG_WAIT_FOR_DSC;
return ide_queue_pc_tail(drive, disk, &pc, 0);
return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
}
EXPORT_SYMBOL_GPL(ide_do_start_stop);
@ -147,7 +147,7 @@ int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on)
pc.c[0] = ALLOW_MEDIUM_REMOVAL;
pc.c[4] = on;
return ide_queue_pc_tail(drive, disk, &pc, 0);
return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
}
EXPORT_SYMBOL_GPL(ide_set_media_lock);