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block: Reset buffer alignment on detach 

BlockDriverState member buffer_alignment is initially 512.  The device
model may set them, with bdrv_set_buffer_alignment().  If the device
model gets detached (hot unplug), the device's alignment is left
behind.  Only okay because device hot unplug automatically destroys
the BlockDriverState.  But that's a questionable feature, best not to
rely on it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Markus Armbruster 2011-09-06 18:58:57 +02:00 committed by Kevin Wolf
parent 7b6f9300d5
commit 29e05f2022
1 changed files with 1 additions and 0 deletions
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block.c
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@ -788,6 +788,7 @@ void bdrv_detach_dev(BlockDriverState *bs, void *dev)
bs->dev = NULL;
bs->dev_ops = NULL;
bs->dev_opaque = NULL;
bs->buffer_alignment = 512;
}
/* TODO change to return DeviceState * when all users are qdevified */