linux-kernel - [PATCH 1/3] drm: Avoid circular dependencies for CONFIG

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Message-Id: <20210602215252.695994-2-keescook@chromium.org>
Date:   Wed,  2 Jun 2021 14:52:50 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Dave Airlie <airlied@...hat.com>
Cc:     Kees Cook <keescook@...omium.org>, Arnd Bergmann <arnd@...nel.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        kernel test robot <lkp@...el.com>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Emma Anholt <emma@...olt.net>, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>,
        Sharat Masetty <smasetty@...eaurora.org>,
        Rob Herring <robh@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org
Subject: [PATCH 1/3] drm: Avoid circular dependencies for CONFIG_FB

When cleaning up other drm config dependencies, it is too easy to create
larger problems. Instead, mark CONFIG_FB as a "depends":

drivers/gpu/drm/Kconfig:74:error: recursive dependency detected!

Suggested-by: Arnd Bergmann <arnd@...nel.org>
Link: https://lore.kernel.org/lkml/CAK8P3a3jUQs6c5tESSNMbqfuymewj9FhqRizyHcfOXf8Rgy-nA@mail.gmail.com/
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 drivers/gpu/drm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 3c16bd1afd87..90891284ccec 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -83,7 +83,7 @@ config DRM_KMS_HELPER
 config DRM_KMS_FB_HELPER
 	bool
 	depends on DRM_KMS_HELPER
-	select FB
+	depends on FB
 	select FRAMEBUFFER_CONSOLE if !EXPERT
 	select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
 	select FB_SYS_FOPS
-- 
2.25.1