[PATCH] drm/xe: fix CONFIGFS_FS dependency

[Jude Gyimah]

xe_configfs.o is pulled into the xe module only when configfs is enabled:

  xe-$(CONFIG_CONFIGFS_FS) += xe_configfs.o

With CONFIG_DRM_XE=y and CONFIG_CONFIGFS_FS=m that line becomes xe-m,
which Kbuild ignores for a built-in module, so the object is left out
while the rest of xe still calls into it:

  xe_guc.c:(.text+0x217e): undefined reference to
    `xe_configfs_get_psmi_enabled'
  xe_guc_ads.c:(.text+0x1a28): undefined reference to
    `xe_configfs_get_enable_multi_queue'

Eleven xe_configfs_* symbols are undefined in all, referenced from
xe_module.o, xe_guc.o and xe_guc_ads.o.

Require configfs to be at least as available as xe, which is what the
stanza already does for KUNIT, INTEL_VSEC and X86_PLATFORM_DEVICES.

Reproduced on v7.3, x86_64, with:

  CONFIG_DRM_XE=y
  CONFIG_CONFIGFS_FS=m
  CONFIG_DRM=y
  CONFIG_PCI=y
  CONFIG_MODULES=y

Found with kreach, a static check that compares what Kconfig allows
against the symbols the compiled objects actually reference.

Fixes: 16280ded45fb ("drm/xe: Add configfs to enable survivability mode")
Signed-off-by: Jude Gyimah <jude.gyimah87@xxxxxxxxx>
---
The checker is at https://github.com/JGyimah/kreach, and the
reproducer configuration for each finding is published with it
under results/.

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

diff --git a/drivers/gpu/drm/xe/Kconfig b/drivers/gpu/drm/xe/Kconfig
index 4d7dcaff2b91..fe3061f3b4ec 100644
--- a/drivers/gpu/drm/xe/Kconfig
+++ b/drivers/gpu/drm/xe/Kconfig
@@ -4,6 +4,7 @@ config DRM_XE
 	depends on DRM && PCI
 	depends on KUNIT || !KUNIT
 	depends on INTEL_VSEC || !INTEL_VSEC
+	depends on CONFIGFS_FS || !CONFIGFS_FS
 	depends on X86_PLATFORM_DEVICES || !(X86 && ACPI)
 	depends on PAGE_SIZE_4KB || COMPILE_TEST || BROKEN
 	select INTERVAL_TREE
-- 
2.43.0