[PATCH] swsusp: resume_store() retval fix

- This function returns -EINVAL all the time.  Fix.

- Decruftify it a bit too.

- Writing to it doesn't seem to do what it's suppoed to do.

Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 027322a..4d944b2 100644 (file)
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -363,30 +363,28 @@ static ssize_t resume_show(struct subsystem * subsys, char *buf)
                       MINOR(swsusp_resume_device));
 }
 
-static ssize_t resume_store(struct subsystem * subsys, const char * buf, size_t n)
+static ssize_t resume_store(struct subsystem *subsys, const char *buf, size_t n)
 {
-       int len;
-       char *p;
        unsigned int maj, min;
-       int error = -EINVAL;
        dev_t res;
+       int ret = -EINVAL;
 
-       p = memchr(buf, '\n', n);
-       len = p ? p - buf : n;
+       if (sscanf(buf, "%u:%u", &maj, &min) != 2)
+               goto out;
 
-       if (sscanf(buf, "%u:%u", &maj, &min) == 2) {
-               res = MKDEV(maj,min);
-               if (maj == MAJOR(res) && min == MINOR(res)) {
-                       down(&pm_sem);
-                       swsusp_resume_device = res;
-                       up(&pm_sem);
-                       printk("Attempting manual resume\n");
-                       noresume = 0;
-                       software_resume();
-               }
-       }
+       res = MKDEV(maj,min);
+       if (maj != MAJOR(res) || min != MINOR(res))
+               goto out;
 
-       return error >= 0 ? n : error;
+       down(&pm_sem);
+       swsusp_resume_device = res;
+       up(&pm_sem);
+       printk("Attempting manual resume\n");
+       noresume = 0;
+       software_resume();
+       ret = n;
+out:
+       return ret;
 }
 
 power_attr(resume);