Driver core: accept all valid action-strings in uevent-trigger

This allows the uevent file to handle any type of uevent action to be
triggered by userspace instead of just the "add" uevent.


Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 20 insertions, 3 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 0455aa78fa13..91a0367d583e 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -24,6 +24,8 @@
 #include "base.h"
 #include "power/power.h"
 
+extern const char *kobject_actions[];
+
 int (*platform_notify)(struct device * dev) = NULL;
 int (*platform_notify_remove)(struct device * dev) = NULL;
 
@@ -303,10 +305,25 @@ out:
 static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
                             const char *buf, size_t count)
 {
-        if (memcmp(buf, "add", 3) != 0)
-                dev_err(dev, "uevent: unsupported action-string; this will "
-                        "be ignored in a future kernel version");
+        size_t len = count;
+        enum kobject_action action;
+
+        if (len && buf[len-1] == '\n')
+                len--;
+
+        for (action = 0; action < KOBJ_MAX; action++) {
+                if (strncmp(kobject_actions[action], buf, len) != 0)
+                        continue;
+                if (kobject_actions[action][len] != '\0')
+                        continue;
+                kobject_uevent(&dev->kobj, action);
+                goto out;
+        }
+
+        dev_err(dev, "uevent: unsupported action-string; this will "
+                     "be ignored in a future kernel version\n");
         kobject_uevent(&dev->kobj, KOBJ_ADD);
+out:
         return count;
 }