Patch "drm/sti: Depend on OF rather than selecting it" has been added to the 4.17-stable tree

[gregkh at linuxfoundation.org]

This is a note to let you know that I've just added the patch titled

    drm/sti: Depend on OF rather than selecting it

to the 4.17-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-sti-depend-on-of-rather-than-selecting-it.patch
and it can be found in the queue-4.17 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable at vger.kernel.org> know about it.


>From c9fea6f4379c72b7c59e1efceab09a35bc7eac43 Mon Sep 17 00:00:00 2001
From: Oliver O'Halloran <oohall at gmail.com>
Date: Tue, 3 Apr 2018 15:34:01 +1000
Subject: drm/sti: Depend on OF rather than selecting it

From: Oliver O'Halloran <oohall at gmail.com>

commit c9fea6f4379c72b7c59e1efceab09a35bc7eac43 upstream.

Commit cc6b741c6f63 ("drm: sti: remove useless fields from vtg
structure") reworked some code inside of this driver and made it select
CONFIG_OF. This results in the entire OF layer being enabled when
building an allmodconfig on ia64. OF on ia64 is completely unsupported
so this isn't a great state of affairs.

The 0day robot noticed a link-time failure on ia64 caused by
using of_node_to_nid() in an otherwise unrelated driver. The
generic fallback for of_node_to_nid() only exists when:

	defined(CONFIG_OF) && defined(CONFIG_NUMA) == false

Since CONFIG_NUMA is usually selected for IA64 we get the link failure.
Fix this by making the driver depend on OF rather than selecting it,
odds are that was the original intent.

Link: https://lists.01.org/pipermail/kbuild-all/2018-March/045172.html
Fixes: cc6b741c6f63 ("drm: sti: remove useless fields from vtg structure")
Cc: Benjamin Gaignard <benjamin.gaignard at linaro.org>
Cc: Vincent Abriou <vincent.abriou at st.com>
Cc: David Airlie <airlied at linux.ie>
Cc: dri-devel at lists.freedesktop.org
Cc: linux-ia64 at vger.kernel.org
Cc: stable at vger.kernel.org
Signed-off-by: Oliver O'Halloran <oohall at gmail.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard at linaro.org>
Signed-off-by: Philippe Cornu <philippe.cornu at st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180403053401.30045-1-oohall@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>

---
 drivers/gpu/drm/sti/Kconfig |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/gpu/drm/sti/Kconfig
+++ b/drivers/gpu/drm/sti/Kconfig
@@ -1,6 +1,6 @@
 config DRM_STI
 	tristate "DRM Support for STMicroelectronics SoC stiH4xx Series"
-	depends on DRM && (ARCH_STI || ARCH_MULTIPLATFORM)
+	depends on OF && DRM && (ARCH_STI || ARCH_MULTIPLATFORM)
 	select RESET_CONTROLLER
 	select DRM_KMS_HELPER
 	select DRM_GEM_CMA_HELPER
@@ -8,6 +8,5 @@ config DRM_STI
 	select DRM_PANEL
 	select FW_LOADER
 	select SND_SOC_HDMI_CODEC if SND_SOC
-	select OF
 	help
 	  Choose this option to enable DRM on STM stiH4xx chipset


Patches currently in stable-queue which might be from oohall at gmail.com are

queue-4.17/drm-sti-depend-on-of-rather-than-selecting-it.patch