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authorFelipe Balbi <balbi@ti.com>2013-02-20 12:31:42 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-15 20:39:15 +0400
commit8f46baaa7ec6cd0851794020b31958e64679dd26 (patch)
treed075f91c3a8ef47237df697664efb22b7e676a14 /drivers/base/core.c
parentbe871b7e54711479d3b9d3617d49898770830db2 (diff)
downloadlinux-8f46baaa7ec6cd0851794020b31958e64679dd26.tar.xz
base: core: WARN() about bogus permissions on device attributes
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 <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/core.c')
-rw-r--r--drivers/base/core.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 56536f4b0f6b..a7391a30cb29 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;
}