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| author | Jens Axboe <axboe@suse.de> | 2005-06-20 14:06:01 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@suse.de> | 2005-06-20 14:06:01 +0200 |
| commit | dd1cab95f356f1395278633565f198463cf6bd24 (patch) | |
| tree | ddf12e2fad7c0df0656a10ee6aac3f12a04dbed8 /drivers/cdrom | |
| parent | b823825e8e09aac6dc1ca362cd5639a87329d636 (diff) | |
| download | linux-3.10-dd1cab95f356f1395278633565f198463cf6bd24.tar.gz linux-3.10-dd1cab95f356f1395278633565f198463cf6bd24.tar.bz2 linux-3.10-dd1cab95f356f1395278633565f198463cf6bd24.zip | |
[PATCH] Cleanup blk_rq_map_* interfaces
Change the blk_rq_map_user() and blk_rq_map_kern() interface to require
a previously allocated request to be passed in. This is both more efficient
for multiple iterations of mapping data to the same request, and it is also
a much nicer API.
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'drivers/cdrom')
| -rw-r--r-- | drivers/cdrom/cdrom.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index beaa561f2ed..6a7d926774a 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -2097,6 +2097,10 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, if (!q) return -ENXIO; + rq = blk_get_request(q, READ, GFP_KERNEL); + if (!rq) + return -ENOMEM; + cdi->last_sense = 0; while (nframes) { @@ -2108,9 +2112,9 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, len = nr * CD_FRAMESIZE_RAW; - rq = blk_rq_map_user(q, READ, ubuf, len); - if (IS_ERR(rq)) - return PTR_ERR(rq); + ret = blk_rq_map_user(q, rq, ubuf, len); + if (ret) + break; memset(rq->cmd, 0, sizeof(rq->cmd)); rq->cmd[0] = GPCMD_READ_CD; @@ -2138,7 +2142,7 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, cdi->last_sense = s->sense_key; } - if (blk_rq_unmap_user(rq, bio, len)) + if (blk_rq_unmap_user(bio, len)) ret = -EFAULT; if (ret) @@ -2149,6 +2153,7 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, ubuf += len; } + blk_put_request(rq); return ret; } |