linux-kernel - [PATCH 4.19 161/245] USB: EHCI: ehci-mv: fix error handling in mv_ehci

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Message-Id: <20200929105954.821072910@linuxfoundation.org>
Date:   Tue, 29 Sep 2020 13:00:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Zhang Shengju <zhangshengju@...s.chinamobile.com>,
        Tang Bin <tangbin@...s.chinamobile.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 161/245] USB: EHCI: ehci-mv: fix error handling in mv_ehci_probe()

From: Tang Bin <tangbin@...s.chinamobile.com>

[ Upstream commit c856b4b0fdb5044bca4c0acf9a66f3b5cc01a37a ]

If the function platform_get_irq() failed, the negative value
returned will not be detected here. So fix error handling in
mv_ehci_probe(). And when get irq failed, the function
platform_get_irq() logs an error message, so remove redundant
message here.

Signed-off-by: Zhang Shengju <zhangshengju@...s.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
Link: https://lore.kernel.org/r/20200508114305.15740-1-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/host/ehci-mv.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
index de764459e05a6..4edcd7536a01b 100644
--- a/drivers/usb/host/ehci-mv.c
+++ b/drivers/usb/host/ehci-mv.c
@@ -193,9 +193,8 @@ static int mv_ehci_probe(struct platform_device *pdev)
 	hcd->regs = ehci_mv->op_regs;
 
 	hcd->irq = platform_get_irq(pdev, 0);
-	if (!hcd->irq) {
-		dev_err(&pdev->dev, "Cannot get irq.");
-		retval = -ENODEV;
+	if (hcd->irq < 0) {
+		retval = hcd->irq;
 		goto err_disable_clk;
 	}
 
-- 
2.25.1