From ff50afe9aceb6264a4fbe40459da75170fb9a2a2 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 29 Nov 2012 15:59:34 +0100 Subject: [PATCH] drm/i915: WARN on !crtc in intel_dp_link_down This could have happened with the old crtc helper based modeset code, but can't happen any longer with the new code. Hence put in a WARN and adjust the comment. If no one hits this, we can eventually remove it (like a few other such cases across our code). Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 89164c553b2d..84652ca3b161 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2098,15 +2098,10 @@ intel_dp_link_down(struct intel_dp *intel_dp) /* Changes to enable or select take place the vblank * after being written. */ - if (crtc == NULL) { - /* We can arrive here never having been attached - * to a CRTC, for instance, due to inheriting - * random state from the BIOS. - * - * If the pipe is not running, play safe and - * wait for the clocks to stabilise before - * continuing. - */ + if (WARN_ON(crtc == NULL)) { + /* We should never try to disable a port without a crtc + * attached. For paranoia keep the code around for a + * bit. */ POSTING_READ(intel_dp->output_reg); msleep(50); } else -- 2.30.2