sysfs: Fix return values for sysdev_store_{ulong,int}

SYSFS: Fix return values for sysdev_store_{ulong,int}

Always return the full size instead of the consumed
length of the string in sysdev_store_{ulong,int}

This avoids EINVAL errors in some echo versions.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/base/sys.c

@@ -488,7 +488,8 @@ ssize_t sysdev_store_ulong(struct sys_device *sysdev,
 	if (end == buf)
 		return -EINVAL;
 	*(unsigned long *)(ea->var) = new;
-	return end - buf;
+	/* Always return full write size even if we didn't consume all */
+	return size;
 }
 EXPORT_SYMBOL_GPL(sysdev_store_ulong);
 
@@ -511,7 +512,8 @@ ssize_t sysdev_store_int(struct sys_device *sysdev,
 	if (end == buf || new > INT_MAX || new < INT_MIN)
 		return -EINVAL;
 	*(int *)(ea->var) = new;
-	return end - buf;
+	/* Always return full write size even if we didn't consume all */
+	return size;
 }
 EXPORT_SYMBOL_GPL(sysdev_store_int);