A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

block: add blk_rq_set_block_pc()

Browse source 
With the optimizations around not clearing the full request at alloc
time, we are leaving some of the needed init for REQ_TYPE_BLOCK_PC
up to the user allocating the request.

Add a blk_rq_set_block_pc() that sets the command type to
REQ_TYPE_BLOCK_PC, and properly initializes the members associated
with this type of request. Update callers to use this function instead
of manipulating rq->cmd_type directly.

Includes fixes from Christoph Hellwig <[email protected]> for my half-assed
attempt.

Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2014-06-06 07:57:37 -06:00
commit f27b087b81
17 changed files with 41 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

18
block/blk-core.c
View file

@ -1218,6 +1218,8 @@ struct request *blk_make_request(struct request_queue *q, struct bio *bio,
if (unlikely(!rq))
return ERR_PTR(-ENOMEM);
blk_rq_set_block_pc(rq);
for_each_bio(bio) {
struct bio *bounce_bio = bio;
int ret;
@ -1234,6 +1236,22 @@ struct request *blk_make_request(struct request_queue *q, struct bio *bio,
}
EXPORT_SYMBOL(blk_make_request);
/**
* blk_rq_set_block_pc - initialize a requeest to type BLOCK_PC
* @rq: request to be initialized
*
*/
void blk_rq_set_block_pc(struct request *rq)
{
rq->cmd_type = REQ_TYPE_BLOCK_PC;
rq->__data_len = 0;
rq->__sector = (sector_t) -1;
rq->bio = rq->biotail = NULL;
memset(rq->__cmd, 0, sizeof(rq->__cmd));
rq->cmd = rq->__cmd;
}
EXPORT_SYMBOL(blk_rq_set_block_pc);
/**
* blk_requeue_request - put a request back on queue
* @q: request queue where request should be inserted

3
block/bsg.c
View file

@ -196,7 +196,6 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
* fill in request structure
*/
rq->cmd_len = hdr->request_len;
rq->cmd_type = REQ_TYPE_BLOCK_PC;
rq->timeout = msecs_to_jiffies(hdr->timeout);
if (!rq->timeout)
@ -273,6 +272,8 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
rq = blk_get_request(q, rw, GFP_KERNEL);
if (!rq)
return ERR_PTR(-ENOMEM);
blk_rq_set_block_pc(rq);
ret = blk_fill_sgv4_hdr_rq(q, rq, hdr, bd, has_write_perm);
if (ret)
goto out;

6
block/scsi_ioctl.c
View file

@ -229,7 +229,6 @@ static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
* fill in request structure
*/
rq->cmd_len = hdr->cmd_len;
rq->cmd_type = REQ_TYPE_BLOCK_PC;
rq->timeout = msecs_to_jiffies(hdr->timeout);
if (!rq->timeout)
@ -311,6 +310,7 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
if (!rq)
return -ENOMEM;
blk_rq_set_block_pc(rq);
if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
blk_put_request(rq);
@ -491,7 +491,7 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->cmd_type = REQ_TYPE_BLOCK_PC;
blk_rq_set_block_pc(rq);
blk_execute_rq(q, disk, rq, 0);
@ -524,7 +524,7 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
int err;
rq = blk_get_request(q, WRITE, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_BLOCK_PC;
blk_rq_set_block_pc(rq);
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
rq->cmd[0] = cmd;
rq->cmd[4] = data;