From 175006956740f70ca23394c58f8d7804776741bd Mon Sep 17 00:00:00 2001
From: Sergey Shtylyov <s.shtylyov@omp.ru>
Date: Mon, 9 Aug 2021 23:23:51 +0300
Subject: [PATCH] usb: dwc3: qcom: add IRQ check
Git-commit: 175006956740f70ca23394c58f8d7804776741bd
References: git-fixes
Patch-mainline: v5.15-rc1

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")
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/45fec3da-1679-5bfe-5d74-219ca3fb28e7@omp.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/usb/dwc3/dwc3-qcom.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -490,6 +490,10 @@ static int dwc3_qcom_acpi_register_core(
 		qcom->acpi_pdata->dwc3_core_base_size;
 
 	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		ret = irq;
+		goto out;
+	}
 	child_res[1].flags = IORESOURCE_IRQ;
 	child_res[1].start = child_res[1].end = irq;