drm/i915: fix a read size argument

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")
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: <drm-intel-fixes@lists.freedesktop.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161013085508.GJ16198@mwanda
(cherry picked from commit f7170e2eb8f6bf7ef2032cc0659cd38740bf5b97)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 14a3cf0b72133a2734cb98059fbdd524578dc392..ee8aa95967deb4c394de7561900a5555be3110a3 100644 (file)
--- 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);