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ide-atapi: don't abuse rq->buffer 

Impact: rq->buffer usage cleanup

ide-atapi uses rq->buffer as private opaque value for internal special
requests.  rq->special isn't used for these cases (the only case where
rq->special is used is for ide-tape rw requests).  Use rq->special
instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tejun Heo 2009-04-19 07:00:42 +09:00 committed by Jens Axboe
parent d868ca2430
commit ac0b0113dd
3 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/ide/ide-atapi.c
View File

@ -90,7 +90,7 @@ static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
blk_rq_init(NULL, rq); blk_rq_init(NULL, rq);
rq->cmd_type = REQ_TYPE_SPECIAL; rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd_flags |= REQ_PREEMPT; rq->cmd_flags |= REQ_PREEMPT;
rq->buffer = (char *)pc; rq->special = (char *)pc;
rq->rq_disk = disk; rq->rq_disk = disk;
if (pc->req_xfer) { if (pc->req_xfer) {
@ -119,7 +119,7 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
rq = blk_get_request(drive->queue, READ, __GFP_WAIT); rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL; rq->cmd_type = REQ_TYPE_SPECIAL;
rq->buffer = (char *)pc; rq->special = (char *)pc;
if (pc->req_xfer) { if (pc->req_xfer) {
rq->data = pc->buf; rq->data = pc->buf;

2
drivers/ide/ide-floppy.c
View File

@ -264,7 +264,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
pc = &floppy->queued_pc; pc = &floppy->queued_pc;
idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block); idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
} else if (blk_special_request(rq)) { } else if (blk_special_request(rq)) {
pc = (struct ide_atapi_pc *) rq->buffer; pc = (struct ide_atapi_pc *)rq->special;
} else if (blk_pc_request(rq)) { } else if (blk_pc_request(rq)) {
pc = &floppy->queued_pc; pc = &floppy->queued_pc;
idefloppy_blockpc_cmd(floppy, pc, rq); idefloppy_blockpc_cmd(floppy, pc, rq);

2
drivers/ide/ide-tape.c
View File

@ -828,7 +828,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
goto out; goto out;
} }
if (rq->cmd[13] & REQ_IDETAPE_PC1) { if (rq->cmd[13] & REQ_IDETAPE_PC1) {
pc = (struct ide_atapi_pc *) rq->buffer; pc = (struct ide_atapi_pc *)rq->special;
rq->cmd[13] &= ~(REQ_IDETAPE_PC1); rq->cmd[13] &= ~(REQ_IDETAPE_PC1);
rq->cmd[13] |= REQ_IDETAPE_PC2; rq->cmd[13] |= REQ_IDETAPE_PC2;
goto out; goto out;