Commit b05d4c57 authored by Ira Weiny's avatar Ira Weiny Committed by Dan Williams
Browse files

dax: Ensure errno is returned from dax_direct_access 



If the caller specifies a negative nr_pages that is an invalid
parameter.

Return -EINVAL to ensure callers get an errno if they want to check it.

Reviewed-by: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarIra Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20210525172428.3634316-4-ira.weiny@intel.com


Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 44788591

drivers/dax/super.c

+1 −1
Original line number Diff line number Diff line
@@ -313,7 +313,7 @@ long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, 
		return -ENXIO;



	if (nr_pages < 0)

		return nr_pages;

		return -EINVAL;



	avail = dax_dev->ops->direct_access(dax_dev, pgoff, nr_pages,

			kaddr, pfn);