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authorFabio Estevam <fabio.estevam@nxp.com>2016-08-23 15:48:20 +0300
committerDavid S. Miller <davem@davemloft.net>2016-08-24 03:10:16 +0300
commit53080fe9c451e7625e71b91c384e7bef1be72b00 (patch)
tree7b958b33fc7edfa7bcdfb35a651d61dfe0d5de01 /drivers/net/ethernet/nxp/lpc_eth.c
parent1bc261fabe866c4cdc97f52319eaa0c7ee31026e (diff)
downloadlinux-53080fe9c451e7625e71b91c384e7bef1be72b00.tar.xz
net: lpc_eth: Check clk_prepare_enable() error
clk_prepare_enable() may fail, so we should better check its return value and propagate it in the case of failure While at it, replace __lpc_eth_clock_enable() with a plain clk_prepare_enable/clk_disable_unprepare() call in order to simplify the code. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Acked-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/nxp/lpc_eth.c')
-rw-r--r--drivers/net/ethernet/nxp/lpc_eth.c20
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 4d4ecba0aad9..8e13ec84c538 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -475,14 +475,6 @@ static void __lpc_get_mac(struct netdata_local *pldat, u8 *mac)
mac[5] = tmp >> 8;
}
-static void __lpc_eth_clock_enable(struct netdata_local *pldat, bool enable)
-{
- if (enable)
- clk_prepare_enable(pldat->clk);
- else
- clk_disable_unprepare(pldat->clk);
-}
-
static void __lpc_params_setup(struct netdata_local *pldat)
{
u32 tmp;
@@ -1056,7 +1048,7 @@ static int lpc_eth_close(struct net_device *ndev)
writel(0, LPC_ENET_MAC2(pldat->net_base));
spin_unlock_irqrestore(&pldat->lock, flags);
- __lpc_eth_clock_enable(pldat, false);
+ clk_disable_unprepare(pldat->clk);
return 0;
}
@@ -1197,11 +1189,14 @@ static int lpc_eth_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
static int lpc_eth_open(struct net_device *ndev)
{
struct netdata_local *pldat = netdev_priv(ndev);
+ int ret;
if (netif_msg_ifup(pldat))
dev_dbg(&pldat->pdev->dev, "enabling %s\n", ndev->name);
- __lpc_eth_clock_enable(pldat, true);
+ ret = clk_prepare_enable(pldat->clk);
+ if (ret)
+ return ret;
/* Suspended PHY makes LPC ethernet core block, so resume now */
phy_resume(ndev->phydev);
@@ -1320,7 +1315,9 @@ static int lpc_eth_drv_probe(struct platform_device *pdev)
}
/* Enable network clock */
- __lpc_eth_clock_enable(pldat, true);
+ ret = clk_prepare_enable(pldat->clk);
+ if (ret)
+ goto err_out_clk_put;
/* Map IO space */
pldat->net_base = ioremap(res->start, resource_size(res));
@@ -1454,6 +1451,7 @@ err_out_iounmap:
iounmap(pldat->net_base);
err_out_disable_clocks:
clk_disable_unprepare(pldat->clk);
+err_out_clk_put:
clk_put(pldat->clk);
err_out_free_dev:
free_netdev(ndev);