[PATCH] ll_rw_blk: fix missing bounce in blk_rq_map_kern()
I think we might just need the blk_map_kern users now. For the async execute I added the bounce code already and the block SG_IO has it atleady. I think the blk_map_kern bounce code got dropped because we thought the correct gfp_t would be passed in. But I think all we need is the patch below and all the paths are take care of. The patch is not tested. Patch was made against scsi-misc. The last place that is sending non sg commands may just be md/dm-emc.c but that is is just waiting on alasdair to take some patches that fix that and a bunch of junk in there including adding bounce support. If the patch below is ok though and dm-emc finally gets converted then it will have sg and bonce buffer support. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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@ -2558,6 +2558,7 @@ int blk_rq_map_kern(request_queue_t *q, struct request *rq, void *kbuf,
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bio->bi_rw |= (1 << BIO_RW);
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blk_rq_bio_prep(q, rq, bio);
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blk_queue_bounce(q, &rq->bio);
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rq->buffer = rq->data = NULL;
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return 0;
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}
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