From 21c5ffb363930dfe6213bb677c5811fede3bcee2 Mon Sep 17 00:00:00 2001
From: Sergio Lopez <slp(a)redhat.com>
Date: Thu, 21 Jan 2021 15:46:51 +0800
Subject: [PATCH] virtio-blk: Refactor the code that processes queued requests

Move the code that processes queued requests from
virtio_blk_dma_restart_bh() to its own, non-static, function. This
will allow us to call it from the virtio_blk_data_plane_start() in a
future patch.

Signed-off-by: Sergio Lopez <slp(a)redhat.com>
Message-Id: <20200603093240.40489-2-slp(a)redhat.com>
Signed-off-by: Kevin Wolf <kwolf(a)redhat.com>
---
 hw/block/virtio-blk.c          | 16 +++++++++++-----
 include/hw/virtio/virtio-blk.h |  1 +
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 703ed4c93b..cee2c673a5 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -809,15 +809,11 @@ static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq)
     virtio_blk_handle_output_do(s, vq);
 }
 
-static void virtio_blk_dma_restart_bh(void *opaque)
+void virtio_blk_process_queued_requests(VirtIOBlock *s)
 {
-    VirtIOBlock *s = opaque;
     VirtIOBlockReq *req = s->rq;
     MultiReqBuffer mrb = {};
 
-    qemu_bh_delete(s->bh);
-    s->bh = NULL;
-
     s->rq = NULL;
 
     aio_context_acquire(blk_get_aio_context(s->conf.conf.blk));
@@ -845,6 +841,16 @@ static void virtio_blk_dma_restart_bh(void *opaque)
     aio_context_release(blk_get_aio_context(s->conf.conf.blk));
 }
 
+static void virtio_blk_dma_restart_bh(void *opaque)
+{
+    VirtIOBlock *s = opaque;
+
+    qemu_bh_delete(s->bh);
+    s->bh = NULL;
+
+    virtio_blk_process_queued_requests(s);
+}
+
 static void virtio_blk_dma_restart_cb(void *opaque, int running,
                                       RunState state)
 {
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index cddcfbebe9..cf8eea2f58 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -84,5 +84,6 @@ typedef struct MultiReqBuffer {
 } MultiReqBuffer;
 
 bool virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq);
+void virtio_blk_process_queued_requests(VirtIOBlock *s);
 
 #endif
-- 
2.27.0