linux-kernel - [PATCH 5.4 194/214] usb: host: ohci-exynos: Fix error handling in exynos_ohci

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Message-Id: <20200901151002.244766167@linuxfoundation.org>
Date:   Tue,  1 Sep 2020 17:11:14 +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>,
        Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH 5.4 194/214] usb: host: ohci-exynos: Fix error handling in exynos_ohci_probe()

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

commit 1d4169834628d18b2392a2da92b7fbf5e8e2ce89 upstream.

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

Fixes: 62194244cf87 ("USB: Add Samsung Exynos OHCI diver")
Signed-off-by: Zhang Shengju <zhangshengju@...s.chinamobile.com>
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
Link: https://lore.kernel.org/r/20200826144931.1828-1-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/host/ohci-exynos.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -171,9 +171,8 @@ static int exynos_ohci_probe(struct plat
 	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;
 	}