ASoC: cs42l42: Only report button state if there was a button interrupt

[ Upstream commit ea75dee ]

Only report a button state change if the interrupt status shows that
there was a button event.

Previously the code would always drop into the button reporting at the
end of interrupt handling if the jack was present. If neither of the
button report interrupts were pending it would report all buttons
released. This could then lead to a button being reported as released
while it is still pressed.

Fixes: c5b8ee0 ("ASoC: cs42l42: Report jack and button detection")
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220815123138.3810249-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

sound/soc/codecs/cs42l42.c

@@ -1618,7 +1618,6 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
 	unsigned int current_plug_status;
 	unsigned int current_button_status;
 	unsigned int i;
-	int report = 0;
 
 	mutex_lock(&cs42l42->irq_lock);
 	if (cs42l42->suspended) {
@@ -1713,13 +1712,15 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
 
 			if (current_button_status & CS42L42_M_DETECT_TF_MASK) {
 				dev_dbg(cs42l42->dev, "Button released\n");
-				report = 0;
+				snd_soc_jack_report(cs42l42->jack, 0,
+						    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+						    SND_JACK_BTN_2 | SND_JACK_BTN_3);
 			} else if (current_button_status & CS42L42_M_DETECT_FT_MASK) {
-				report = cs42l42_handle_button_press(cs42l42);
-
+				snd_soc_jack_report(cs42l42->jack,
+						    cs42l42_handle_button_press(cs42l42),
+						    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+						    SND_JACK_BTN_2 | SND_JACK_BTN_3);
 			}
-			snd_soc_jack_report(cs42l42->jack, report, SND_JACK_BTN_0 | SND_JACK_BTN_1 |
-								   SND_JACK_BTN_2 | SND_JACK_BTN_3);
 		}
 	}