[PATCH 3/3] dax: Ensure errno is returned from dax_direct_access

[ira . weiny]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

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: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
 drivers/dax/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 5fa6ae9dbc8b..44736cbd446e 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -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);
-- 
2.28.0.rc0.12.gb6a658bd00c9