[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH] virtio-scsi: introduce virtio_scsi_acquire/release
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH] virtio-scsi: introduce virtio_scsi_acquire/release |
Date: |
Tue, 29 Nov 2016 16:37:01 +0100 |
These will be used more as soon as the acquire/release is pushed down to
the ioeventfd handlers.
Signed-off-by: Paolo Bonzini <address@hidden>
---
hw/scsi/virtio-scsi.c | 27 ++++++++++++++++++---------
1 file changed, 18 insertions(+), 9 deletions(-)
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 10fd687..34bba35 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -420,6 +420,20 @@ static void virtio_scsi_handle_ctrl_req(VirtIOSCSI *s,
VirtIOSCSIReq *req)
}
}
+static inline void virtio_scsi_acquire(VirtIOSCSI *s)
+{
+ if (s->ctx) {
+ aio_context_acquire(s->ctx);
+ }
+}
+
+static inline void virtio_scsi_release(VirtIOSCSI *s)
+{
+ if (s->ctx) {
+ aio_context_release(s->ctx);
+ }
+}
+
void virtio_scsi_handle_ctrl_vq(VirtIOSCSI *s, VirtQueue *vq)
{
VirtIOSCSIReq *req;
@@ -691,10 +705,7 @@ void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
return;
}
- if (s->dataplane_started) {
- assert(s->ctx);
- aio_context_acquire(s->ctx);
- }
+ virtio_scsi_acquire(s);
req = virtio_scsi_pop_req(s, vs->event_vq);
if (!req) {
@@ -730,9 +741,7 @@ void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
}
virtio_scsi_complete_req(req);
out:
- if (s->dataplane_started) {
- aio_context_release(s->ctx);
- }
+ virtio_scsi_release(s);
}
void virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq)
@@ -778,9 +787,9 @@ static void virtio_scsi_hotplug(HotplugHandler
*hotplug_dev, DeviceState *dev,
if (blk_op_is_blocked(sd->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) {
return;
}
- aio_context_acquire(s->ctx);
+ virtio_scsi_acquire(s);
blk_set_aio_context(sd->conf.blk, s->ctx);
- aio_context_release(s->ctx);
+ virtio_scsi_release(s);
}
--
2.9.3
- [Qemu-devel] [PATCH] virtio-scsi: introduce virtio_scsi_acquire/release,
Paolo Bonzini <=