null-aio: Run CB in original AioContext

AIO callbacks must be called in the originally calling AioContext,
regardless of the BDS’s “main” AioContext.

Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-ID: <20251110154854.151484-19-hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

diff --git a/block/null.c b/block/null.c
index 4e448d593d7364ea5bb062e7aee26d896c48f783..253d20ccbb6c051c9de55a08307f7b115a9c272c 100644 (file)
--- a/block/null.c
+++ b/block/null.c
@@ -173,18 +173,17 @@ static inline BlockAIOCB *null_aio_common(BlockDriverState *bs,
 {
     NullAIOCB *acb;
     BDRVNullState *s = bs->opaque;
+    AioContext *ctx = qemu_get_current_aio_context();
 
     acb = qemu_aio_get(&null_aiocb_info, bs, cb, opaque);
     /* Only emulate latency after vcpu is running. */
     if (s->latency_ns) {
-        aio_timer_init(bdrv_get_aio_context(bs), &acb->timer,
-                       QEMU_CLOCK_REALTIME, SCALE_NS,
+        aio_timer_init(ctx, &acb->timer, QEMU_CLOCK_REALTIME, SCALE_NS,
                        null_timer_cb, acb);
         timer_mod_ns(&acb->timer,
                      qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + s->latency_ns);
     } else {
-        replay_bh_schedule_oneshot_event(bdrv_get_aio_context(bs),
-                                         null_bh_cb, acb);
+        replay_bh_schedule_oneshot_event(ctx, null_bh_cb, acb);
     }
     return &acb->common;
 }