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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Tang Bin <tangbin@cmss.chinamobile.com>,
        Zhang Shengju <zhangshengju@cmss.chinamobile.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH 4.19 047/131] usb: host: ehci-exynos: Fix error check in exynos_ehci_probe()
Date:   Mon, 29 Jun 2020 11:33:38 -0400
Message-Id: <20200629153502.2494656-48-sashal@kernel.org>
In-Reply-To: <20200629153502.2494656-1-sashal@kernel.org>
References: <20200629153502.2494656-1-sashal@kernel.org>
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From: Tang Bin <tangbin@cmss.chinamobile.com>

commit 44ed240d62736ad29943ec01e41e194b96f7c5e9 upstream.

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

Fixes: 1bcc5aa87f04 ("USB: Add initial S5P EHCI driver")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20200602114708.28620-1-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/ehci-exynos.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 8e3bab1e0c1f6..f433883ca2bf1 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -188,9 +188,8 @@ static int exynos_ehci_probe(struct platform_device *pdev)
 	hcd->rsrc_len = resource_size(res);
 
 	irq = platform_get_irq(pdev, 0);
-	if (!irq) {
-		dev_err(&pdev->dev, "Failed to get IRQ\n");
-		err = -ENODEV;
+	if (irq < 0) {
+		err = irq;
 		goto fail_io;
 	}
 
-- 
2.25.1