Device mapper may create a non-zoned mapped device out of a zoned device
(e.g., the dm-zoned target). In such case, some queue limit such as the
max_zone_append_sectors and zone_write_granularity endup being non zero
values for a block device that is not zoned. Avoid this by clearing
these limits in blk_stack_limits() when the stacked zoned limit is
false.
Fixes: 3093a479727b ("block: inherit the zoned characteristics in blk_stack_limits")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
---
block/blk-settings.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 06ea91e51b8b..5adadce08408 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -689,6 +689,10 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
t->zone_write_granularity = max(t->zone_write_granularity,
b->zone_write_granularity);
t->zoned = max(t->zoned, b->zoned);
+ if (!t->zoned) {
+ t->zone_write_granularity = 0;
+ t->max_zone_append_sectors = 0;
+ }
return ret;
}
EXPORT_SYMBOL(blk_stack_limits);
--
2.43.2
