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| author | Tejun Heo <tj@kernel.org> | 2009-04-19 07:00:42 +0900 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2009-04-19 07:00:42 +0900 |
| commit | eace4cb04c0edc9388e987bf9bbdef461f6daca4 (patch) | |
| tree | 3cd10182940039df2c99b0029ae0badf6fc5ada1 /drivers/ide/ide-taskfile.c | |
| parent | 7f006dc24fae158131116c9472874f12e16cf040 (diff) | |
| download | kernel_samsung_smdk4412-eace4cb04c0edc9388e987bf9bbdef461f6daca4.zip kernel_samsung_smdk4412-eace4cb04c0edc9388e987bf9bbdef461f6daca4.tar.gz kernel_samsung_smdk4412-eace4cb04c0edc9388e987bf9bbdef461f6daca4.tar.bz2 | |
ide-taskfile: don't abuse rq->buffer
Impact: rq->buffer usage cleanup
ide_raw_taskfile() directly uses rq->buffer to carry pointer to the
data buffer. This complicates both block interface and ide backend
request handling. Use blk_rq_map_kern() instead and drop special
handling for REQ_TYPE_ATA_TASKFILE from ide_map_sg().
Note that REQ_RW setting is moved upwards as blk_rq_map_kern() uses it
to initialize bio rw flag.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/ide/ide-taskfile.c')
| -rw-r--r-- | drivers/ide/ide-taskfile.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c index 4aa6223..f400eb4 100644 --- a/drivers/ide/ide-taskfile.c +++ b/drivers/ide/ide-taskfile.c @@ -424,7 +424,9 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf, rq = blk_get_request(drive->queue, READ, __GFP_WAIT); rq->cmd_type = REQ_TYPE_ATA_TASKFILE; - rq->buffer = buf; + + if (cmd->tf_flags & IDE_TFLAG_WRITE) + rq->cmd_flags |= REQ_RW; /* * (ks) We transfer currently only whole sectors. @@ -432,18 +434,20 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf, * if we would find a solution to transfer any size. * To support special commands like READ LONG. */ - rq->hard_nr_sectors = rq->nr_sectors = nsect; - rq->hard_cur_sectors = rq->current_nr_sectors = nsect; - - if (cmd->tf_flags & IDE_TFLAG_WRITE) - rq->cmd_flags |= REQ_RW; + if (nsect) { + error = blk_rq_map_kern(drive->queue, rq, buf, + nsect * SECTOR_SIZE, __GFP_WAIT); + if (error) + goto put_req; + } rq->special = cmd; cmd->rq = rq; error = blk_execute_rq(drive->queue, NULL, rq, 0); - blk_put_request(rq); +put_req: + blk_put_request(rq); return error; } |