[Intel-gfx] [PATCH v2 4/7] drm/i915/sdvo: Check that we have space for the infoframe

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Before we go writing the infoframe let's make sure we have
the space for it. Not that it really matters since the write
loop would just terminate early in that case.

v2: Check after the debug print and ++ (Chris)

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_sdvo.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 7f64352a3413..14348dfb024a 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -976,6 +976,9 @@ static bool intel_sdvo_write_infoframe(struct intel_sdvo *intel_sdvo,
 	DRM_DEBUG_KMS("writing sdvo hbuf: %i, hbuf_size %i, hbuf_size: %i\n",
 		      if_index, length, hbuf_size);
 
+	if (hbuf_size < length)
+		return false;
+
 	for (i = 0; i < hbuf_size; i += 8) {
 		memset(tmp, 0, 8);
 		if (i < length)
-- 
2.21.0