From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Date: Thu, 13 Oct 2016 08:55:08 +0000 Subject: [patch] drm/i915: fix a read size argument Message-Id: <20161013085508.GJ16198@mwanda> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Daniel Vetter , Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Cc: David Airlie , intel-gfx@lists.freedesktop.org, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org We want to read 3 bytes here, but because the parenthesis are in the wrong place we instead read: sizeof(intel_dp->edp_dpcd) = sizeof(intel_dp->edp_dpcd) which is one byte. Fixes: fe5a66f91c88 ("drm/i915: Read PSR caps/intermediate freqs/etc. only once on eDP") Signed-off-by: Dan Carpenter diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 14a3cf0..ee8aa95 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3551,8 +3551,8 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp) /* Read the eDP Display control capabilities registers */ if ((intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & DP_DPCD_DISPLAY_CONTROL_CAPABLE) && drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV, - intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd) = - sizeof(intel_dp->edp_dpcd))) + intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd)) = + sizeof(intel_dp->edp_dpcd)) DRM_DEBUG_KMS("EDP DPCD : %*ph\n", (int) sizeof(intel_dp->edp_dpcd), intel_dp->edp_dpcd);