From fd0fa91a72b6d3e218ebeb9107e6a65cac610573 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 14 Feb 2022 19:59:08 +0100
Subject: [PATCH] drm/i915: Depend on !PREEMPT_RT.

References: SLE Realtime Extension
Patch-mainline: v5.18-rc1
Git-commit: a8b2b8b06e10224c547d90ea97c483b4de511b22

There are a few sections in the driver which are not compatible with
PREEMPT_RT. They trigger warnings and can lead to deadlocks at runtime.

Disable the i915 driver on a PREEMPT_RT enabled kernel. This way
PREEMPT_RT itself can be enabled without needing to address the i915
issues first. The RT related patches are still in RT queue and will be
handled later.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/YgqmfKhwU5spS069@linutronix.de
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
 drivers/gpu/drm/i915/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index fe6b34774483..d79434dacc86 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -3,6 +3,7 @@ config DRM_I915
 	tristate "Intel 8xx/9xx/G3x/G4x/HD Graphics"
 	depends on DRM
 	depends on X86 && PCI
+	depends on !PREEMPT_RT
 	select INTEL_GTT
 	select INTERVAL_TREE
 	# we need shmfs for the swappable backing store, and in particular