[PATCH 4.4 020/268] ALSA: hda - Use IS_REACHABLE() for dependency on input

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@xxxxxxx>

[ Upstream commit c469652bb5e8fb715db7d152f46d33b3740c9b87 ]

The commit ffcd28d88e4f ("ALSA: hda - Select INPUT for Realtek
HD-audio codec") introduced the reverse-selection of CONFIG_INPUT for
Realtek codec in order to avoid the mess with dependency between
built-in and modules.  Later on, we obtained IS_REACHABLE() macro
exactly for this kind of problems, and now we can remove th INPUT
selection in Kconfig and put IS_REACHABLE(INPUT) to the appropriate
places in the code, so that the driver doesn't need to select other
subsystem forcibly.

Fixes: ffcd28d88e4f ("ALSA: hda - Select INPUT for Realtek HD-audio codec")
Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> # and build-tested
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 sound/pci/hda/Kconfig         |    1 -
 sound/pci/hda/patch_realtek.c |    5 +++++
 2 files changed, 5 insertions(+), 1 deletion(-)

--- a/sound/pci/hda/Kconfig
+++ b/sound/pci/hda/Kconfig
@@ -84,7 +84,6 @@ config SND_HDA_PATCH_LOADER
 config SND_HDA_CODEC_REALTEK
 	tristate "Build Realtek HD-audio codec support"
 	select SND_HDA_GENERIC
-	select INPUT
 	help
 	  Say Y or M here to include Realtek HD-audio codec support in
 	  snd-hda-intel driver, such as ALC880.
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3495,6 +3495,7 @@ static void alc280_fixup_hp_gpio4(struct
 	}
 }
 
+#if IS_REACHABLE(INPUT)
 static void gpio2_mic_hotkey_event(struct hda_codec *codec,
 				   struct hda_jack_callback *event)
 {
@@ -3627,6 +3628,10 @@ static void alc233_fixup_lenovo_line2_mi
 		spec->kb_dev = NULL;
 	}
 }
+#else /* INPUT */
+#define alc280_fixup_hp_gpio2_mic_hotkey	NULL
+#define alc233_fixup_lenovo_line2_mic_hotkey	NULL
+#endif /* INPUT */
 
 static void alc269_fixup_hp_line1_mic1_led(struct hda_codec *codec,
 				const struct hda_fixup *fix, int action)