[PATCH] ASoC: dwc: Propagate -EPROBE_DEFER from IRQ lookup

[phucduc . bui]

From: bui duc phuc <phucduc.bui@xxxxxxxxx>

platform_get_irq_optional() never returns 0. It returns a positive IRQ
number on success or a negative error code on failure.

Return -EPROBE_DEFER from platform_get_irq_optional() so the driver is
re-probed when the interrupt resource becomes available instead of
continuing probe without an IRQ.

Signed-off-by: bui duc phuc <phucduc.bui@xxxxxxxxx>
---
 sound/soc/dwc/dwc-i2s.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c
index 74dfd39fd604..2e9fb79b1cd8 100644
--- a/sound/soc/dwc/dwc-i2s.c
+++ b/sound/soc/dwc/dwc-i2s.c
@@ -955,7 +955,9 @@ static int dw_i2s_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq_optional(pdev, 0);
-	if (irq >= 0) {
+	if (irq == -EPROBE_DEFER)
+		return irq;
+	if (irq > 0) {
 		ret = devm_request_irq(&pdev->dev, irq, i2s_irq_handler, 0,
 				pdev->name, dev);
 		if (ret < 0) {
-- 
2.43.0