From: Greg Kroah-Hartman gregkh@linuxfoundation.org
From: Jeffle Xu jefflexu@linux.alibaba.com
commit 5b0fab508992c2e120971da658ce80027acbc405 upstream.
Fix dm_table_supports_dax() and invert logic of both iterate_devices_callout_fn so that all devices' DAX capabilities are properly checked.
Fixes: 545ed20e6df6 ("dm: add infrastructure for DAX support") Cc: stable@vger.kernel.org Signed-off-by: Jeffle Xu jefflexu@linux.alibaba.com Signed-off-by: Mike Snitzer snitzer@redhat.com [jeffle: no dax write cache, no dax synchronous] Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/dm-table.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -848,12 +848,12 @@ void dm_table_set_type(struct dm_table * } EXPORT_SYMBOL_GPL(dm_table_set_type);
-static int device_supports_dax(struct dm_target *ti, struct dm_dev *dev, - sector_t start, sector_t len, void *data) +static int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t len, void *data) { struct request_queue *q = bdev_get_queue(dev->bdev);
- return q && blk_queue_dax(q); + return q && !blk_queue_dax(q); }
static bool dm_table_supports_dax(struct dm_table *t) @@ -869,7 +869,7 @@ static bool dm_table_supports_dax(struct return false;
if (!ti->type->iterate_devices || - !ti->type->iterate_devices(ti, device_supports_dax, NULL)) + ti->type->iterate_devices(ti, device_not_dax_capable, NULL)) return false; }