From: Jani Nikula Date: Thu, 4 Feb 2016 10:50:50 +0000 (+0200) Subject: drm/i915/dsi: don't pass arbitrary data to sideband X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=26f6f2d301c1fb46acb1138ee155125815239b0d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915/dsi: don't pass arbitrary data to sideband Since sequence block v2 the second byte contains flags other than just pull up/down. Don't pass arbitrary data to the sideband interface. The rest may or may not work for sequence block v2, but there should be no harm done. Cc: stable@vger.kernel.org Reviewed-by: Ville Syrjälä Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/ebe3c2eee623afc4b3a134533b01f8d591d13f32.1454582914.git.jani.nikula@intel.com (cherry picked from commit 4e1c63e3761b84ec7d87c75b58bbc8bcf18e98ee) Signed-off-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c index 349775e88e5b..a8912aecc31f 100644 --- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c +++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c @@ -207,7 +207,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data) gpio = *data++; /* pull up/down */ - action = *data++; + action = *data++ & 1; if (gpio >= ARRAY_SIZE(gtable)) { DRM_DEBUG_KMS("unknown gpio %u\n", gpio);