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[Qemu-devel] [PATCH 2/2] nbd: add missed aio_context_acquire in nbd_expo

From: Denis V. Lunev
Subject: [Qemu-devel] [PATCH 2/2] nbd: add missed aio_context_acquire in nbd_export_new
Date: Wed, 20 Jan 2016 10:12:20 +0300

blk_invalidate_cache() can call qcow2_invalidate_cache which performs
IO inside.

Signed-off-by: Denis V. Lunev <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Paolo Bonzini <address@hidden>
 nbd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/nbd.c b/nbd.c
index b3d9654..b271db5 100644
--- a/nbd.c
+++ b/nbd.c
@@ -1080,7 +1080,9 @@ NBDExport *nbd_export_new(BlockBackend *blk, off_t 
dev_offset, off_t size,
      * that BDRV_O_INCOMING is cleared and the image is ready for write
      * access since the export could be available before migration handover.
+    aio_context_acquire(exp->ctx);
     blk_invalidate_cache(blk, NULL);
+    aio_context_release(exp->ctx);
     return exp;

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