From d59814a5b4852442e1d03c569a4542f8b08356a7 Mon Sep 17 00:00:00 2001 From: "Balasubramaniam, Hari Chand" Date: Tue, 15 Aug 2017 10:05:46 +0800 Subject: [PATCH] drm/i915: Initialize 'data' in intel_dsi_dcs_backlight.c variable 'data' may be used uninitialized in this function. thus, 'function dcs_get_backlight' will return unwanted value/fail. Thus, adding NULL initialized to 'data' variable will solve the return failure happening. v2: Change commit message to reflect upstream with proper message Fixes: 90198355b83c ("drm/i915/dsi: Add DCS control for Panel PWM") Cc: Jani Nikula Cc: Daniel Vetter Cc: Yetunde Adebisi Cc: Deepak M Cc: Jani Nikula Signed-off-by: Balasubramaniam, Hari Chand Reviewed-by: Jani Nikula Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/1502762746-191826-1-git-send-email-hari.chand.balasubramaniam@intel.com --- drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c b/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c index 6e09ceb71500..150a156f3b1e 100644 --- a/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c +++ b/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c @@ -46,7 +46,7 @@ static u32 dcs_get_backlight(struct intel_connector *connector) struct intel_encoder *encoder = connector->encoder; struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); struct mipi_dsi_device *dsi_device; - u8 data; + u8 data = 0; enum port port; /* FIXME: Need to take care of 16 bit brightness level */ -- 2.20.1