[PATCH 5.5 051/120] watchdog: qcom: Use platform_get_irq_optional() for bark irq

[Greg Kroah-Hartman]

From: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>

commit e0b4f4e0cf7fa9d62628d4249c765ec18dffd143 upstream.

platform_get_irq() prints an error message when the interrupt
is not available. So on platforms where bark interrupt is
not specified, following error message is observed on SDM845.

[    2.975888] qcom_wdt 17980000.watchdog: IRQ index 0 not found

This is also seen on SC7180, SM8150 SoCs as well.
Fix this by using platform_get_irq_optional() instead.

Fixes: 36375491a4395654 ("watchdog: qcom: support pre-timeout when the bark irq is available")
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>
Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20191213064934.4112-1-saiprakash.ranjan@xxxxxxxxxxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/watchdog/qcom-wdt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -246,7 +246,7 @@ static int qcom_wdt_probe(struct platfor
 	}
 
 	/* check if there is pretimeout support */
-	irq = platform_get_irq(pdev, 0);
+	irq = platform_get_irq_optional(pdev, 0);
 	if (irq > 0) {
 		ret = devm_request_irq(dev, irq, qcom_wdt_isr,
 				       IRQF_TRIGGER_RISING,