usb: musb: fix error return code in omap2430_probe()

Before calling platform_get_resource() in omap2430_probe(), the 'ret' is
re-assgined to 0, it can't return an error code, if platform_get_resource
fails. Set the error code to -EINVAL to fix this.

Fixes: ffbe2fe ("usb: musb: omap2430: Fix probe regression for missing resources")
Cc: stable <[email protected]>
Signed-off-by: Yang Yingliang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Yang Yingliang

drivers/usb/musb/omap2430.c

@@ -411,8 +411,10 @@ static int omap2430_probe(struct platform_device *pdev)
 		memset(musb_res, 0, sizeof(*musb_res) * ARRAY_SIZE(musb_res));
 
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-		if (!res)
+		if (!res) {
+			ret = -EINVAL;
 			goto err2;
+		}
 
 		musb_res[i].start = res->start;
 		musb_res[i].end = res->end;