Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu in…

…to staging

Pull request

Fix the hang in the nvme:// block driver during startup.

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# gpg:                using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
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# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]

* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
  block/nvme: invoke blk_io_plug_call() outside q->lock

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

block/nvme.c

@@ -501,8 +501,9 @@ static void nvme_submit_command(NVMeQueuePair *q, NVMeRequest *req,
            q->sq.tail * NVME_SQ_ENTRY_BYTES, cmd, sizeof(*cmd));
     q->sq.tail = (q->sq.tail + 1) % NVME_QUEUE_SIZE;
     q->need_kick++;
-    blk_io_plug_call(nvme_unplug_fn, q);
     qemu_mutex_unlock(&q->lock);
+
+    blk_io_plug_call(nvme_unplug_fn, q);
 }
 
 static void nvme_admin_cmd_sync_cb(void *opaque, int ret)