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author | Al Viro <viro@zeniv.linux.org.uk> | 2016-10-10 23:02:51 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-10-10 23:02:51 -0400 |
commit | 3873691e5ab34fa26948643d038a2b98c4437298 (patch) | |
tree | 5327469194c2167830bce38b56a618b754cdbeea /block/blk-mq.c | |
parent | c2050a454c7f123d7a57fa1d76ff61bd43643abb (diff) | |
parent | aadfa8019e8114539cfa0b1eb2e5a9c83094a590 (diff) | |
download | linux-stable-3873691e5ab34fa26948643d038a2b98c4437298.tar.gz linux-stable-3873691e5ab34fa26948643d038a2b98c4437298.tar.bz2 linux-stable-3873691e5ab34fa26948643d038a2b98c4437298.zip |
Merge remote-tracking branch 'ovl/rename2' into for-linus
Diffstat (limited to 'block/blk-mq.c')
-rw-r--r-- | block/blk-mq.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 13f5a6c1de76..c207fa9870eb 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -296,17 +296,29 @@ struct request *blk_mq_alloc_request_hctx(struct request_queue *q, int rw, if (ret) return ERR_PTR(ret); + /* + * Check if the hardware context is actually mapped to anything. + * If not tell the caller that it should skip this queue. + */ hctx = q->queue_hw_ctx[hctx_idx]; + if (!blk_mq_hw_queue_mapped(hctx)) { + ret = -EXDEV; + goto out_queue_exit; + } ctx = __blk_mq_get_ctx(q, cpumask_first(hctx->cpumask)); blk_mq_set_alloc_data(&alloc_data, q, flags, ctx, hctx); rq = __blk_mq_alloc_request(&alloc_data, rw, 0); if (!rq) { - blk_queue_exit(q); - return ERR_PTR(-EWOULDBLOCK); + ret = -EWOULDBLOCK; + goto out_queue_exit; } return rq; + +out_queue_exit: + blk_queue_exit(q); + return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(blk_mq_alloc_request_hctx); |