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block: Invoke change media CB before NULLing drv 

In order to handle host device passthrough, some guest device models
may call blk_is_inserted() to check whether the medium is inserted on
the host, when checking the guest tray status.

This tray status is inquired by blk_dev_change_media_cb(); because
bdrv_is_inserted() (invoked by blk_is_inserted()) always returns false
for BDS with drv set to NULL, blk_dev_change_media_cb() should therefore
be called before drv is set to NULL.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2015-10-19 17:53:15 +02:00 committed by Kevin Wolf
parent 1354c47378
commit b4d02820d9
1 changed files with 4 additions and 4 deletions
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8
block.c
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@ -1912,6 +1912,10 @@ void bdrv_close(BlockDriverState *bs)
bdrv_drain(bs); /* in case flush left pending I/O */
notifier_list_notify(&bs->close_notifiers, bs);
if (bs->blk) {
blk_dev_change_media_cb(bs->blk, false);
}
if (bs->drv) {
BdrvChild *child, *next;
@ -1950,10 +1954,6 @@ void bdrv_close(BlockDriverState *bs)
bs->full_open_options = NULL;
}
if (bs->blk) {
blk_dev_change_media_cb(bs->blk, false);
}
QLIST_FOREACH_SAFE(ban, &bs->aio_notifiers, list, ban_next) {
g_free(ban);
}