device-dax: delete a redundancy check in dev_dax_validate_align()

After we have done the alignment check for the length of each range, the
alignment check for dev_dax_size(dev_dax) is no longer needed, because it
get the sum of the length of each range.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20201120092057.2144-1-thunder.leizhen@huawei.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 27513d3..9761cb4 100644 (file)
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -1114,16 +1114,9 @@ static ssize_t align_show(struct device *dev,
 
 static ssize_t dev_dax_validate_align(struct dev_dax *dev_dax)
 {
-       resource_size_t dev_size = dev_dax_size(dev_dax);
        struct device *dev = &dev_dax->dev;
        int i;
 
-       if (dev_size > 0 && !alloc_is_aligned(dev_dax, dev_size)) {
-               dev_dbg(dev, "%s: align %u invalid for size %pa\n",
-                       __func__, dev_dax->align, &dev_size);
-               return -EINVAL;
-       }
-
        for (i = 0; i < dev_dax->nr_range; i++) {
                size_t len = range_len(&dev_dax->ranges[i].range);