Be a little paranoid in case the specs change or something.
Signed-off-by: Jani Nikula <[email protected]>
---
drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index d078c5765014..30fcb02fce9b 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -441,7 +441,15 @@ static void generic_exec_sequence(struct drm_panel *panel,
enum mipi_seq seq_id)
operation_size = *data++;
if (mipi_elem_exec) {
+ const u8 *next = data + operation_size;
+
data = mipi_elem_exec(intel_dsi, data);
+
+ /* Consistency check if we have size. */
+ if (operation_size && data != next) {
+ DRM_ERROR("Inconsistent operation size\n");
+ return;
+ }
} else if (operation_size) {
/* We have size, skip. */
DRM_DEBUG_KMS("Unsupported MIPI operation byte %u\n",
--
2.1.4
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