platform/x86: dell: fix DELL_WMI_PRIVACY dependencies & build error

When DELL_WMI=y, DELL_WMI_PRIVACY=y, and LEDS_TRIGGER_AUDIO=m, there
is a linker error since the LEDS trigger code is built as a loadable
module. This happens because DELL_WMI_PRIVACY is a bool that depends
on a tristate (LEDS_TRIGGER_AUDIO=m), which can be dangerous.

ld: drivers/platform/x86/dell/dell-wmi-privacy.o: in function `dell_privacy_wmi_probe':
dell-wmi-privacy.c:(.text+0x3df): undefined reference to `ledtrig_audio_get'

Fixes: 8af9fa37b8a3 ("platform/x86: dell-privacy: Add support for Dell hardware privacy")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Perry Yuan <Perry.Yuan@dell.com>
Cc: Dell.Client.Kernel@dell.com
Cc: platform-driver-x86@vger.kernel.org
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mark Gross <mgross@linux.intel.com>
Link: https://lore.kernel.org/r/20210918044829.19222-1-rdunlap@infradead.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig
index 821aba3..42513ea 100644 (file)
--- a/drivers/platform/x86/dell/Kconfig
+++ b/drivers/platform/x86/dell/Kconfig
@@ -166,8 +166,7 @@ config DELL_WMI
 
 config DELL_WMI_PRIVACY
        bool "Dell WMI Hardware Privacy Support"
-       depends on DELL_WMI
-       depends on LEDS_TRIGGER_AUDIO
+       depends on LEDS_TRIGGER_AUDIO = y || DELL_WMI = LEDS_TRIGGER_AUDIO
        help
          This option adds integration with the "Dell Hardware Privacy"
          feature of Dell laptops to the dell-wmi driver.