linux-kernel - [PATCH v3] drm: bridge: fix unmet dependency on DRM_KMS_HELPER for DRM_PANEL

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220117052146.75811-1-julianbraha@gmail.com>
Date:   Mon, 17 Jan 2022 00:21:46 -0500
From:   Julian Braha <julianbraha@...il.com>
To:     narmstrong@...libre.com, jonas@...boo.se, jernej.skrabec@...il.com,
        airlied@...ux.ie, daniel@...ll.ch
Cc:     robert.foss@...aro.org, jagan@...rulasolutions.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        fazilyildiran@...il.com,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: [PATCH v3] drm: bridge: fix unmet dependency on DRM_KMS_HELPER for DRM_PANEL_BRIDGE

When DRM_CHIPONE_ICN6211 is selected, and DRM_KMS_HELPER is not selected,
Kbuild gives the following warning:

WARNING: unmet direct dependencies detected for DRM_PANEL_BRIDGE
  Depends on [n]: HAS_IOMEM [=y] && DRM_BRIDGE [=y] && DRM_KMS_HELPER [=n]
  Selected by [y]:
  - DRM_CHIPONE_ICN6211 [=y] && HAS_IOMEM [=y] && DRM [=y] && DRM_BRIDGE [=y] && OF [=y]

This is because DRM_CHIPONE_ICN6211 selects DRM_PANEL_BRIDGE
without depending on or selecting DRM_KMS_HELPER,
despite DRM_PANEL_BRIDGE depending on DRM_KMS_HELPER.

This unmet dependency bug was detected by Kismet,
a static analysis tool for Kconfig.
Please advise if this is not the appropriate solution.

Fixes: ce517f18944e ("drm: bridge: Add Chipone ICN6211 MIPI-DSI to RGB bridge")
Reviewed-by: Robert Foss <robert.foss@...aro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Julian Braha <julianbraha@...il.com>
---
v2:
- changed from "select" to "depends on"

v3:
- new line now uses tabs instead of spaces.

 drivers/gpu/drm/bridge/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 61db5a66b493..a1b52eaf26e0 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -30,6 +30,7 @@ config DRM_CDNS_DSI
 config DRM_CHIPONE_ICN6211
 	tristate "Chipone ICN6211 MIPI-DSI/RGB Converter bridge"
 	depends on OF
+	depends on DRM_KMS_HELPER
 	select DRM_MIPI_DSI
 	select DRM_PANEL_BRIDGE
 	help
--
2.32.0