diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2016-09-19 15:02:30 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2016-09-19 18:38:11 +0300 |
| commit | 8e4f768c434e3c197a1b6d59c8e6d0807b10c4cd (patch) | |
| tree | 41dc0ab580abf593b233ecc29fffe509ec948a68 /drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | |
| parent | 4b4f497e13f0195dd305d0b1dea06291e1e6f521 (diff) | |
drm/i915/dsi: double check element parsing against size if present
Be a little paranoid in case the specs change or something.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/27050d48d0ff3d58e79fcacc41ced4c071b01424.1474286487.git.jani.nikula@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dsi_panel_vbt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c index 24953f9f7e1d..9f279a3d0f74 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", |