In dwc3_qcom_acpi_register_core(), the driver neglects to check the result
of platform_get_irq()'s call and blithely assigns the negative error codes
to the allocated child device's IRQ resource and then passing this resource
to platform_device_add_resources() and later causing dwc3_otg_get_irq() to
fail anyway.  Stop calling platform_device_add_resources() with the invalid
IRQ #s, so that there's less complexity in the IRQ error checking.

Fixes: 2bc02355f8ba ("usb: dwc3: qcom: Add support for booting with ACPI")
Signed-off-by: Sergey Shtylyov <redacted>
Acked-by: Felipe Balbi <balbi@kernel.org>

---
Changes in version 2:
- added Felipe's ACK.


 drivers/usb/dwc3/dwc3-qcom.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: usb/drivers/usb/dwc3/dwc3-qcom.c
===================================================================

--- usb.orig/drivers/usb/dwc3/dwc3-qcom.c
+++ usb/drivers/usb/dwc3/dwc3-qcom.c

@@ -614,6 +614,10 @@ static int dwc3_qcom_acpi_register_core(
 		qcom->acpi_pdata->dwc3_core_base_size;
 
 	irq = platform_get_irq(pdev_irq, 0);
+	if (irq < 0) {
+		ret = irq;
+		goto out;
+	}
 	child_res[1].flags = IORESOURCE_IRQ;
 	child_res[1].start = child_res[1].end = irq;