ALSA: wss_lib: fix AZT2320 probe.

After the transition from cs4321_lib to wss_lib, azt2320 probe visits
snd_ad1848_probe during detection. It expects register 0 (LEFT_INPUT)
to be able to retain the value 0xaa during detection but AZT2320 does
not support MIC gain meaning it reads back as 0x8a instead.

Signed-off-by: Rene Herman <rene.herman@gmail.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 7 insertions, 5 deletions

diff --git a/sound/isa/wss/wss_lib.c b/sound/isa/wss/wss_lib.c
index fff8a3b79fdf..866e8686dbe7 100644
--- a/sound/isa/wss/wss_lib.c
+++ b/sound/isa/wss/wss_lib.c
@@ -1168,11 +1168,13 @@ static int snd_ad1848_probe(struct snd_wss *chip)
                                 ad1847 = 1;
                                 break;
                         }
-                        if (snd_wss_in(chip, CS4231_LEFT_INPUT) == 0xaa &&
-                            rev == 0x45) {
-                                spin_unlock_irqrestore(&chip->reg_lock, flags);
-                                id = 1;
-                                break;
+                        if (rev == 0x45) {
+                                rev = snd_wss_in(chip, CS4231_LEFT_INPUT);
+                                if (rev == 0xaa || rev == 0x8a) {
+                                        spin_unlock_irqrestore(&chip->reg_lock, flags);
+                                        id = 1;
+                                        break;
+                                }
                         }
                         spin_unlock_irqrestore(&chip->reg_lock, flags);
                 }