drm/i915/bios: fix format string of the VBT signature logging

Specify the maximum number of letters to print from the potentially
unterminated buffer, not the minimum. While at it, use sizeof instead of
a magic number.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450271061-32646-2-git-send-email-jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index dc3a0fb1946ca8e152fef949fefe02b7341207d3..4c9304e92ff526295096f38bfab35d20e4c531b0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -1326,8 +1326,8 @@ intel_bios_init(struct drm_device *dev)
 
        bdb = get_bdb_header(vbt);
 
-       DRM_DEBUG_KMS("VBT signature \"%20s\", BDB version %d\n",
-                     vbt->signature, bdb->version);
+       DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
+                     (int)sizeof(vbt->signature), vbt->signature, bdb->version);
 
        /* Grab useful general definitions */
        parse_general_features(dev_priv, bdb);