ACPI: Video: Increase buffer size for writes to brightness proc file.

In order to be able to write the value "100"
to /proc/acpi/video/.../brightness, we have to allocate 5 bytes:
4 characters will be written (1, 0, 0 plus null byte),
and 1 byte should be buffer for a terminating NULL character.

http://bugzilla.kernel.org/show_bug.cgi?id=9278

Signed-off-by: Danny Baumann <dannybaumann@web.de>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index dce0a6e47f5ac34d3ce33e07ca7d17fe6cd9bed8..44a0d9ba9bd67268747d4ef9d6355981d0120f09 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -897,7 +897,7 @@ acpi_video_device_write_brightness(struct file *file,
 {
        struct seq_file *m = file->private_data;
        struct acpi_video_device *dev = m->private;
-       char str[4] = { 0 };
+       char str[5] = { 0 };
        unsigned int level = 0;
        int i;