From 3f5b933e60506452ea4f83d8a436607cb1c8fa24 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Tue, 16 Jan 2018 16:53:31 +0100 Subject: [PATCH] drm/i915: Do not WARN_ON with small framebuffers. It's perfectly legal to create a fb with stride < 512, and one of the kms_plane_scaling subtests creates a very small fb. Downgrade the WARN_ON to a simple check check, and because this function is potentially called on every atomic update/pageflip, downgrade the other WARN_ON to a WARN_ON_ONCE, and do the right thing here. Cc: Paulo Zanoni Signed-off-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20180116155331.75175-1-maarten.lankhorst@linux.intel.com Reviewed-by: Rodrigo Vivi --- drivers/gpu/drm/i915/intel_fbc.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index f88c1b5dae4c..9dc2b8b5f2db 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -668,11 +668,13 @@ void intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv) static bool stride_is_valid(struct drm_i915_private *dev_priv, unsigned int stride) { - /* These should have been caught earlier. */ - WARN_ON(stride < 512); - WARN_ON((stride & (64 - 1)) != 0); + /* This should have been caught earlier. */ + if (WARN_ON_ONCE((stride & (64 - 1)) != 0)) + return false; /* Below are the additional FBC restrictions. */ + if (stride < 512) + return false; if (IS_GEN2(dev_priv) || IS_GEN3(dev_priv)) return stride == 4096 || stride == 8192; -- 2.30.2