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block: ensure bios return from blk_get_request are properly initialized

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blk_get_request is used for BLOCK_PC and similar passthrough requests.
Currently we always need to call blk_rq_set_block_pc or an open coded
version of it to allow appending bios using the request mapping helpers
later on, which is a somewhat awkward API.  Instead move the
initialization part of blk_rq_set_block_pc into blk_get_request, so that
we always have a safe to use request.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2016-07-19 11:31:50 +02:00 • committed by Jens Axboe
commit 0c4de0f33b
4 changed files with 11 additions and 10 deletions
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4
drivers/nvme/host/core.c
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@ -222,10 +222,6 @@ struct request *nvme_alloc_request(struct request_queue *q,
req->cmd_type = REQ_TYPE_DRV_PRIV;
req->cmd_flags |= REQ_FAILFAST_DRIVER;
req->__data_len = 0;
req->__sector = (sector_t) -1;
req->bio = req->biotail = NULL;
req->cmd = (unsigned char *)cmd;
req->cmd_len = sizeof(struct nvme_command);