commit 9514fe7a2352e35ff571467afba24ab904a1befe
author Fabio Estevam <fabio.estevam@freescale.com> Sun Jul 21 13:24:59 2013 -0300
committer David S. Miller <davem@davemloft.net> Mon Jul 22 16:50:31 2013 -0700
tree d05b846b6f2bfaa70fc81bcee563b946fc5369c2
parent eda297729171fe16bf34fe5b0419dfb69060f623

fec: Do not enable/disable optional clocks unconditionally

clk_enet_out and clk_ptp are optional clocks, so we should not enable/disable
them unconditionally.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fec_main.c

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index d3ad5ea..beaa576 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2105,8 +2105,10 @@
 
 	clk_prepare_enable(fep->clk_ahb);
 	clk_prepare_enable(fep->clk_ipg);
-	clk_prepare_enable(fep->clk_enet_out);
-	clk_prepare_enable(fep->clk_ptp);
+	if (fep->clk_enet_out)
+		clk_prepare_enable(fep->clk_enet_out);
+	if (fep->clk_ptp)
+		clk_prepare_enable(fep->clk_ptp);
 
 	fep->reg_phy = devm_regulator_get(&pdev->dev, "phy");
 	if (!IS_ERR(fep->reg_phy)) {
@@ -2179,8 +2181,10 @@
 failed_regulator:
 	clk_disable_unprepare(fep->clk_ahb);
 	clk_disable_unprepare(fep->clk_ipg);
-	clk_disable_unprepare(fep->clk_enet_out);
-	clk_disable_unprepare(fep->clk_ptp);
+	if (fep->clk_enet_out)
+		clk_disable_unprepare(fep->clk_enet_out);
+	if (fep->clk_ptp)
+		clk_disable_unprepare(fep->clk_ptp);
 failed_clk:
 failed_ioremap:
 	free_netdev(ndev);
@@ -2206,10 +2210,12 @@
 	}
 	if (fep->reg_phy)
 		regulator_disable(fep->reg_phy);
-	clk_disable_unprepare(fep->clk_ptp);
+	if (fep->clk_ptp)
+		clk_disable_unprepare(fep->clk_ptp);
 	if (fep->ptp_clock)
 		ptp_clock_unregister(fep->ptp_clock);
-	clk_disable_unprepare(fep->clk_enet_out);
+	if (fep->clk_enet_out)
+		clk_disable_unprepare(fep->clk_enet_out);
 	clk_disable_unprepare(fep->clk_ahb);
 	clk_disable_unprepare(fep->clk_ipg);
 	free_netdev(ndev);
@@ -2228,7 +2234,8 @@
 		fec_stop(ndev);
 		netif_device_detach(ndev);
 	}
-	clk_disable_unprepare(fep->clk_enet_out);
+	if (fep->clk_enet_out)
+		clk_disable_unprepare(fep->clk_enet_out);
 	clk_disable_unprepare(fep->clk_ahb);
 	clk_disable_unprepare(fep->clk_ipg);
 
@@ -2251,7 +2258,8 @@
 			return ret;
 	}
 
-	clk_prepare_enable(fep->clk_enet_out);
+	if (fep->clk_enet_out)
+		clk_prepare_enable(fep->clk_enet_out);
 	clk_prepare_enable(fep->clk_ahb);
 	clk_prepare_enable(fep->clk_ipg);
 	if (netif_running(ndev)) {