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 synchronous] Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/dm-table.c | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-)
--- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -889,10 +889,10 @@ 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, +static int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev, sector_t start, sector_t len, void *data) { - return bdev_dax_supported(dev->bdev, PAGE_SIZE); + return !bdev_dax_supported(dev->bdev, PAGE_SIZE); }
static bool dm_table_supports_dax(struct dm_table *t) @@ -908,7 +908,7 @@ 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; }
@@ -1690,23 +1690,6 @@ static int device_dax_write_cache_enable return false; }
-static int dm_table_supports_dax_write_cache(struct dm_table *t) -{ - struct dm_target *ti; - unsigned i; - - for (i = 0; i < dm_table_get_num_targets(t); i++) { - ti = dm_table_get_target(t, i); - - if (ti->type->iterate_devices && - ti->type->iterate_devices(ti, - device_dax_write_cache_enabled, NULL)) - return true; - } - - return false; -} - static int device_is_rotational(struct dm_target *ti, struct dm_dev *dev, sector_t start, sector_t len, void *data) { @@ -1854,7 +1837,7 @@ void dm_table_set_restrictions(struct dm else queue_flag_clear_unlocked(QUEUE_FLAG_DAX, q);
- if (dm_table_supports_dax_write_cache(t)) + if (dm_table_any_dev_attr(t, device_dax_write_cache_enabled)) dax_write_cache(t->md->dax_dev, true);
/* Ensure that all underlying devices are non-rotational. */