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block: add blk_rq_set_block_pc()

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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
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2
drivers/block/pktcdvd.c
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@ -704,6 +704,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
rq = blk_get_request(q, (cgc->data_direction == CGC_DATA_WRITE) ?
WRITE : READ, __GFP_WAIT);
blk_rq_set_block_pc(rq);
if (cgc->buflen) {
ret = blk_rq_map_kern(q, rq, cgc->buffer, cgc->buflen,
@ -716,7 +717,6 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
memcpy(rq->cmd, cgc->cmd, CDROM_PACKET_SIZE);
rq->timeout = 60*HZ;
rq->cmd_type = REQ_TYPE_BLOCK_PC;
if (cgc->quiet)
rq->cmd_flags |= REQ_QUIET;