[Devel] [PATCH RH7 1/5] ploop: Clear PLOOP_S_NO_FALLOC_DISCARD on restart

[Kirill Tkhai]

It looks there is no a better place to do that,
since we do not remove device after it becomes
unused (stop+last delta is removed).

This is indicator of cached ploop device was reused
for another mount.

Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
---
 drivers/block/ploop/dev.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/block/ploop/dev.c b/drivers/block/ploop/dev.c
index 197faa5db05d..64127fa10c45 100644
--- a/drivers/block/ploop/dev.c
+++ b/drivers/block/ploop/dev.c
@@ -3420,8 +3420,10 @@ static int ploop_add_delta(struct ploop_device * plo, unsigned long arg)
 	if (err)
 		goto out_destroy;
 
-	if (list_empty(&plo->map.delta_list))
+	if (list_empty(&plo->map.delta_list)) {
 		plo->fmt_version = PLOOP_FMT_UNDEFINED;
+		clear_bit(PLOOP_S_NO_FALLOC_DISCARD, &delta->plo->state);
+	}
 
 	err = delta->ops->open(delta);
 	if (err)