usb: host: ehci-exynos: Fix error check in exynos_ehci_probe()

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>

diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index a4e9abcbdc4fc7fcb7703aff9cc363eeb013daa9..1a9b7572e17fe681056f054ac764a98ba31919eb 100644 (file)
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -203,9 +203,8 @@ 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;
        }