On Wed, Apr 19, 2017 at 9:11 PM, Arnd Bergmann arnd@arndb.de wrote:

When CONFIG_THERMAL is enabled as a loadable module, and etnaviv is built-in, we get a link error:

drivers/gpu/drm/etnaviv/etnaviv_gpu.o: In function `etnaviv_gpu_bind': etnaviv_gpu.c:(.text.etnaviv_gpu_bind+0x34): undefined reference to `thermal_of_cooling_device_register' etnaviv_gpu.c:(.text.etnaviv_gpu_bind+0xe0): undefined reference to `thermal_cooling_device_unregister' drivers/gpu/drm/etnaviv/etnaviv_gpu.o: In function `etnaviv_gpu_unbind': etnaviv_gpu.c:(.text.etnaviv_gpu_unbind+0xf0): undefined reference to `thermal_cooling_device_unregister'

This adds a Kconfig dependency to prevent etnaviv from being built-in with CONFIG_THERMAL=m, while still allowing the valid configurations. Unfortunately, simply adding the dependency here breaks Kconfig through a dependency loop involving lots of symbols all the way until ACPI_VIDEO, which is the only video driver that explicitly selects 'THERMAL'. Turning this into a 'depends on' addresses the problem. For completeness, I'm also removing the redundant 'select THERMAL' from INTEL_MENLOW, so no other driver uses that statement.

For PDx86 part:

Acked-by: Andy Shevchenko andy.shevchenko@gmail.com

Fixes: bcdfb5e56dc5 ("drm/etnaviv: add etnaviv cooling device") Signed-off-by: Arnd Bergmann arnd@arndb.de

---

drivers/acpi/Kconfig | 2 +- drivers/gpu/drm/etnaviv/Kconfig | 1 + drivers/platform/x86/Kconfig | 1 - 3 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 03cc4e74096b..252399efa8b3 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -184,7 +184,7 @@ config ACPI_VIDEO tristate "Video" depends on X86 && BACKLIGHT_CLASS_DEVICE depends on INPUT

•   select THERMAL
  

•   depends on THERMAL
    help
      This driver implements the ACPI Extensions For Display Adapters
      for integrated graphics devices on motherboard, as specified in
  

diff --git a/drivers/gpu/drm/etnaviv/Kconfig b/drivers/gpu/drm/etnaviv/Kconfig index 71cee4e9fefb..1d6c744e7924 100644 --- a/drivers/gpu/drm/etnaviv/Kconfig +++ b/drivers/gpu/drm/etnaviv/Kconfig @@ -3,6 +3,7 @@ config DRM_ETNAVIV tristate "ETNAVIV (DRM support for Vivante GPU IP cores)" depends on DRM depends on ARCH_MXC || ARCH_DOVE || (ARM && COMPILE_TEST)

•   depends on THERMAL || THERMAL=n
    depends on MMU
    select SHMEM
    select SYNC_FILE
  

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index e229ea317b9c..76ced87efde5 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -544,7 +544,6 @@ config SENSORS_HDAPS config INTEL_MENLOW tristate "Thermal Management driver for Intel menlow platform" depends on ACPI_THERMAL

•   select THERMAL
    ---help---
      ACPI thermal management enhancement driver on
      Intel Menlow platform.
  

-- 2.9.0

Am Mittwoch, den 19.04.2017, 20:11 +0200 schrieb Arnd Bergmann:

When CONFIG_THERMAL is enabled as a loadable module, and etnaviv is built-in, we get a link error:

drivers/gpu/drm/etnaviv/etnaviv_gpu.o: In function `etnaviv_gpu_bind': etnaviv_gpu.c:(.text.etnaviv_gpu_bind+0x34): undefined reference to `thermal_of_cooling_device_register' etnaviv_gpu.c:(.text.etnaviv_gpu_bind+0xe0): undefined reference to `thermal_cooling_device_unregister' drivers/gpu/drm/etnaviv/etnaviv_gpu.o: In function `etnaviv_gpu_unbind': etnaviv_gpu.c:(.text.etnaviv_gpu_unbind+0xf0): undefined reference to `thermal_cooling_device_unregister'

This adds a Kconfig dependency to prevent etnaviv from being built-in with CONFIG_THERMAL=m, while still allowing the valid configurations. Unfortunately, simply adding the dependency here breaks Kconfig through a dependency loop involving lots of symbols all the way until ACPI_VIDEO, which is the only video driver that explicitly selects 'THERMAL'. Turning this into a 'depends on' addresses the problem. For completeness, I'm also removing the redundant 'select THERMAL' from INTEL_MENLOW, so no other driver uses that statement.

Fixes: bcdfb5e56dc5 ("drm/etnaviv: add etnaviv cooling device") Signed-off-by: Arnd Bergmann arnd@arndb.de

This patch mixes a few things, so the subject doesn't really fit. I'm fine with taking the patch trough my tree, if I can get an ACK on the ACPI part.

Regards, Lucas

---

drivers/acpi/Kconfig | 2 +- drivers/gpu/drm/etnaviv/Kconfig | 1 + drivers/platform/x86/Kconfig | 1 - 3 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 03cc4e74096b..252399efa8b3 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -184,7 +184,7 @@ config ACPI_VIDEO tristate "Video" depends on X86 && BACKLIGHT_CLASS_DEVICE depends on INPUT

• select THERMAL

• depends on THERMAL help This driver implements the ACPI Extensions For Display Adapters for integrated graphics devices on motherboard, as specified in

diff --git a/drivers/gpu/drm/etnaviv/Kconfig b/drivers/gpu/drm/etnaviv/Kconfig index 71cee4e9fefb..1d6c744e7924 100644 --- a/drivers/gpu/drm/etnaviv/Kconfig +++ b/drivers/gpu/drm/etnaviv/Kconfig @@ -3,6 +3,7 @@ config DRM_ETNAVIV tristate "ETNAVIV (DRM support for Vivante GPU IP cores)" depends on DRM depends on ARCH_MXC || ARCH_DOVE || (ARM && COMPILE_TEST)

• depends on THERMAL || THERMAL=n depends on MMU select SHMEM select SYNC_FILE

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index e229ea317b9c..76ced87efde5 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -544,7 +544,6 @@ config SENSORS_HDAPS config INTEL_MENLOW tristate "Thermal Management driver for Intel menlow platform" depends on ACPI_THERMAL

• select THERMAL ---help--- ACPI thermal management enhancement driver on Intel Menlow platform.