Merge branch 'nvme-4.18' of git://git.infradead.org/nvme into for-linus

Pull single NVMe fix from Christoph.

* 'nvme-4.18' of git://git.infradead.org/nvme:
  nvme-rdma: fix possible double free of controller async event buffer

diff --git a/block/blk-core.c b/block/blk-core.c
index afd2596..f84a9b7 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -3473,6 +3473,10 @@ static void __blk_rq_prep_clone(struct request *dst, struct request *src)
        dst->cpu = src->cpu;
        dst->__sector = blk_rq_pos(src);
        dst->__data_len = blk_rq_bytes(src);
+       if (src->rq_flags & RQF_SPECIAL_PAYLOAD) {
+               dst->rq_flags |= RQF_SPECIAL_PAYLOAD;
+               dst->special_vec = src->special_vec;
+       }
        dst->nr_phys_segments = src->nr_phys_segments;
        dst->ioprio = src->ioprio;
        dst->extra_len = src->extra_len;

diff --git a/block/blk-mq.c b/block/blk-mq.c
index b6888ff..d394cdd 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1075,6 +1075,9 @@ static bool blk_mq_mark_tag_wait(struct blk_mq_hw_ctx **hctx,
 
 #define BLK_MQ_RESOURCE_DELAY  3               /* ms units */
 
+/*
+ * Returns true if we did some work AND can potentially do more.
+ */
 bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
                             bool got_budget)
 {
@@ -1205,8 +1208,17 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
                        blk_mq_run_hw_queue(hctx, true);
                else if (needs_restart && (ret == BLK_STS_RESOURCE))
                        blk_mq_delay_run_hw_queue(hctx, BLK_MQ_RESOURCE_DELAY);
+
+               return false;
        }
 
+       /*
+        * If the host/device is unable to accept more work, inform the
+        * caller of that.
+        */
+       if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE)
+               return false;
+
        return (queued + errors) != 0;
 }
 

diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index a47e498..d146fed 100644 (file)
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -1244,8 +1244,8 @@ drbd_request_prepare(struct drbd_device *device, struct bio *bio, unsigned long
        _drbd_start_io_acct(device, req);
 
        /* process discards always from our submitter thread */
-       if ((bio_op(bio) & REQ_OP_WRITE_ZEROES) ||
-           (bio_op(bio) & REQ_OP_DISCARD))
+       if (bio_op(bio) == REQ_OP_WRITE_ZEROES ||
+           bio_op(bio) == REQ_OP_DISCARD)
                goto queue_for_submitter_thread;
 
        if (rw == WRITE && req->private_bio && req->i.size