From: Guenter Roeck Date: Thu, 12 Mar 2015 13:58:26 +0000 (-0400) Subject: sysfs: Use only return value from is_visible for the file mode X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=da4759c73b0f1aac79f37bdb39ad2124439c30e7;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git sysfs: Use only return value from is_visible for the file mode Up to now, is_visible can only be used to either remove visibility of a file entirely or to add permissions, but not to reduce permissions. This makes it impossible, for example, to use DEVICE_ATTR_RW to define file attributes and reduce permissions to read-only. This behavior is undesirable and unnecessarily complicates code which needs to reduce permissions; instead of just returning the desired permissions, it has to ensure that the permissions in the attribute variable declaration only reflect the minimal permissions ever needed. Change semantics of is_visible to only use the permissions returned from it instead of oring the returned value with the hard-coded permissions. Signed-off-by: Guenter Roeck Signed-off-by: Vivien Didelot Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index 2554d8835b48..3fdccd99a9d9 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -41,7 +41,7 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj, if (grp->attrs) { for (i = 0, attr = grp->attrs; *attr && !error; i++, attr++) { - umode_t mode = 0; + umode_t mode = (*attr)->mode; /* * In update mode, we're changing the permissions or @@ -56,8 +56,7 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj, continue; } error = sysfs_add_file_mode_ns(parent, *attr, false, - (*attr)->mode | mode, - NULL); + mode, NULL); if (unlikely(error)) break; }