[PATCH 2/4] watchdog: mediatek: Propagate errors from optional IRQ lookup

[phucduc.bui at gmail.com]

From: bui duc phuc <phucduc.bui at gmail.com>

platform_get_irq_optional() returns a positive IRQ number on success or
a negative error code on failure. For an optional IRQ, -ENXIO indicates
that no IRQ is available, while other errors should be propagated.

Instead of only checking for -EPROBE_DEFER, propagate all error codes
returned by platform_get_irq_optional() other than -ENXIO, so that
failures are properly reported to the caller.

Signed-off-by: bui duc phuc <phucduc.bui at gmail.com>
---
 drivers/watchdog/mtk_wdt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 91d110646e16..d9c30e4c80e3 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -422,8 +422,8 @@ static int mtk_wdt_probe(struct platform_device *pdev)
 		mtk_wdt->wdt_dev.info = &mtk_wdt_pt_info;
 		mtk_wdt->wdt_dev.pretimeout = WDT_MAX_TIMEOUT / 2;
 	} else {
-		if (irq == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
+		if (irq != -ENXIO)
+			return irq;
 
 		mtk_wdt->wdt_dev.info = &mtk_wdt_info;
 	}
-- 
2.43.0