From: Fabio Estevam <festevam@gmail.com>
To: davem@davemloft.net
Cc: vz@mleia.com, netdev@vger.kernel.org,
Fabio Estevam <fabio.estevam@nxp.com>
Subject: [PATCH v2] net: lpc_eth: Check clk_prepare_enable() error
Date: Tue, 23 Aug 2016 07:38:03 -0300 [thread overview]
Message-ID: <1471948683-29129-1-git-send-email-festevam@gmail.com> (raw)
From: Fabio Estevam <fabio.estevam@nxp.com>
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>
---
Changes since v1:
- Replace __lpc_eth_clock_enable() with a plain
clk_prepare_enable/clk_disable_unprepare() call (Vladimir)
drivers/net/ethernet/nxp/lpc_eth.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 4d4ecba..cda87ba 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_free_dev;
/* Map IO space */
pldat->net_base = ioremap(res->start, resource_size(res));
--
2.7.4
next reply other threads:[~2016-08-23 10:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-23 10:38 Fabio Estevam [this message]
2016-08-23 11:55 ` [PATCH v2] net: lpc_eth: Check clk_prepare_enable() error Vladimir Zapolskiy
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