Commit c53a7285 authored by Avi Kivity's avatar Avi Kivity Committed by Kevin Wolf
Browse files

block: fix aio_flush segfaults for read-only protocols (e.g. curl) 



Not all block format drivers expose an io_flush method (reasonable for
read-only protocols), so calling io_flush there will immediately segfault.

Fix by checking for the method's existence before calling it.

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent 81a204e4

aio.c

+3 −1
Original line number Diff line number Diff line
@@ -113,8 +113,10 @@ void qemu_aio_flush(void) 
        qemu_aio_wait();



        QLIST_FOREACH(node, &aio_handlers, node) {

            if (node->io_flush) {

                ret |= node->io_flush(node->opaque);

            }

        }

    } while (qemu_bh_poll() || ret > 0);

}