linux-kernel - [PATCH] usb: dwc3: qcom: Check for null irq pointer

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Date:   Mon, 20 Dec 2021 18:15:20 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     agross@...nel.org, bjorn.andersson@...aro.org, balbi@...nel.org,
        gregkh@...uxfoundation.org, p.zabel@...gutronix.de
Cc:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] usb: dwc3: qcom: Check for null irq pointer

The return value of platform_get_irq() needs to be checked.
To avoid use of null pointer in case that there is no irq.

Fixes: 2bc02355f8ba ("usb: dwc3: qcom: Add support for booting with ACPI")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/usb/dwc3/dwc3-qcom.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 49e6ca94486d..f04fb3f2fb85 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -614,6 +614,11 @@ static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
 		qcom->acpi_pdata->dwc3_core_base_size;
 
 	irq = platform_get_irq(pdev_irq, 0);
+	if (!irq) {
+		ret = -EINVAL;
+		goto out;
+	}
+
 	child_res[1].flags = IORESOURCE_IRQ;
 	child_res[1].start = child_res[1].end = irq;
 
-- 
2.25.1