devm_memremap() returns an ERR_PTR() value in case of error.
However, it returns NULL when memremap() failed. This causes
the caller, such as the pmem driver, to proceed and oops later.
Change devm_memremap() to return ERR_PTR(-ENXIO) when memremap()
failed.
Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/memremap.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 70ee377..3427cca 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -136,8 +136,10 @@ void *devm_memremap(struct device *dev, resource_size_t offset,
if (addr) {
*ptr = addr;
devres_add(dev, ptr);
- } else
+ } else {
devres_free(ptr);
+ return ERR_PTR(-ENXIO);
+ }
return addr;
}
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>