linux-kernel - [PATCH] usb: cdns3: remove dead code

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Date:   Mon, 26 Sep 2022 21:59:21 +0800
From:   Dongliang Mu <dzm91@...t.edu.cn>
To:     Peter Chen <peter.chen@...nel.org>,
        Pawel Laszczak <pawell@...ence.com>,
        Roger Quadros <rogerq@...nel.org>,
        Aswath Govindraju <a-govindraju@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Dongliang Mu <mudongliangabcd@...il.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] usb: cdns3: remove dead code

From: Dongliang Mu <mudongliangabcd@...il.com>

Smatch reports the following error:

drivers/usb/cdns3/cdns3-plat.c:113 cdns3_plat_probe() warn:
platform_get_irq() does not return zero

>From the document, platform_get_irq_byname_optional only returns
non-zero value, and negative value on failure.

Fix this by removing the zero value checking.

Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
---
 drivers/usb/cdns3/cdns3-plat.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c
index dc068e940ed5..2bc5d094548b 100644
--- a/drivers/usb/cdns3/cdns3-plat.c
+++ b/drivers/usb/cdns3/cdns3-plat.c
@@ -110,8 +110,6 @@ static int cdns3_plat_probe(struct platform_device *pdev)
 	cdns->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup");
 	if (cdns->wakeup_irq == -EPROBE_DEFER)
 		return cdns->wakeup_irq;
-	else if (cdns->wakeup_irq == 0)
-		return -EINVAL;
 
 	if (cdns->wakeup_irq < 0) {
 		dev_dbg(dev, "couldn't get wakeup irq\n");
-- 
2.35.1