Staging: octeon: don't ignore request_irq() return code

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/octeon/ethernet-rgmii.c

@@ -308,7 +308,7 @@ int cvm_oct_rgmii_init(struct net_device *dev)
 
 	/*
 	 * Due to GMX errata in CN3XXX series chips, it is necessary
-	 * to take the link down immediately whne the PHY changes
+	 * to take the link down immediately when the PHY changes
 	 * state. In order to do this we call the poll function every
 	 * time the RGMII inband status changes.  This may cause
 	 * problems if the PHY doesn't implement inband status
@@ -317,6 +317,8 @@ int cvm_oct_rgmii_init(struct net_device *dev)
 	if (number_rgmii_ports == 0) {
 		r = request_irq(OCTEON_IRQ_RML, cvm_oct_rgmii_rml_interrupt,
 				IRQF_SHARED, "RGMII", &number_rgmii_ports);
+		if (r != 0)
+			return r;
 	}
 	number_rgmii_ports++;