fbdev: fix snprintf() limit in show_bl_curve()
The limit should be "PAGE_SIZE - len" instead of PAGE_SIZE. Also let's
use scnprintf() because snprintf() returns the number of bytes which
would have been printed if there were space and scnprintf() returns the
number of bytes actually printed.
I don't think we are ever going to actually hit this limit in real life.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 60c3f0a..15755ce 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -485,7 +485,7 @@
mutex_lock(&fb_info->bl_curve_mutex);
for (i = 0; i < FB_BACKLIGHT_LEVELS; i += 8)
- len += snprintf(&buf[len], PAGE_SIZE, "%8ph\n",
+ len += scnprintf(&buf[len], PAGE_SIZE - len, "%8ph\n",
fb_info->bl_curve + i);
mutex_unlock(&fb_info->bl_curve_mutex);
