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aio: Fix qemu_aio_wait() to maintain correct walking_handlers count 

Fix qemu_aio_wait() to ensure that registered aio handlers don't get
deleted when they are still active. This is ensured by maintaning the
right count of walking_handlers.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-09-24 14:40:56 +05:30 committed by Kevin Wolf
parent 870f5681c9
commit 00f7853332
1 changed files with 4 additions and 4 deletions
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8
aio.c
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@ -119,7 +119,7 @@ bool qemu_aio_wait(void)
return true;
}
walking_handlers = 1;
walking_handlers++;
FD_ZERO(&rdfds);
FD_ZERO(&wrfds);
@ -147,7 +147,7 @@ bool qemu_aio_wait(void)
}
}
walking_handlers = 0;
walking_handlers--;
/* No AIO operations? Get us out of here */
if (!busy) {
@ -159,7 +159,7 @@ bool qemu_aio_wait(void)
/* if we have any readable fds, dispatch event */
if (ret > 0) {
walking_handlers = 1;
walking_handlers++;
/* we have to walk very carefully in case
* qemu_aio_set_fd_handler is called while we're walking */
@ -187,7 +187,7 @@ bool qemu_aio_wait(void)
}
}
walking_handlers = 0;
walking_handlers--;
}
return true;