Whenever a struct device_attribute is registered
with mismatched permissions - read permission without
a show routine or write permission without store
routine - we will issue a big warning so we catch
those early enough.
Signed-off-by: Felipe Balbi <ba...@ti.com>
---
drivers/base/core.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index a235085..14e6a92 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -563,8 +563,15 @@ int device_create_file(struct device *dev,
const struct device_attribute *attr)
{
int error = 0;
- if (dev)
+
+ if (dev) {
+ WARN(((attr->attr.mode & S_IWUGO) && !attr->store),
+ "Write permission without 'store'\n");
+ WARN(((attr->attr.mode & S_IRUGO) && !attr->show),
+ "Read permission without 'show'\n");
error = sysfs_create_file(&dev->kobj, &attr->attr);
+ }
+
return error;
}
--
1.8.1.rc1.5.g7e0651a
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