From e77980e50bc2850599d4d9c0192b67a9ffd6daac Mon Sep 17 00:00:00 2001 From: David Dueck Date: Wed, 17 Sep 2014 14:26:48 +0200 Subject: [PATCH] can: at91_can: add missing prepare and unprepare of the clock In order to make the driver work with the common clock framework, this patch converts the clk_enable()/clk_disable() to clk_prepare_enable()/clk_disable_unprepare(). While there, add the missing error handling. Signed-off-by: David Dueck Signed-off-by: Anthony Harivel Acked-by: Boris Brezillon Cc: linux-stable Signed-off-by: Marc Kleine-Budde --- drivers/net/can/at91_can.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c index f07fa89b5fd5..05e1aa090add 100644 --- a/drivers/net/can/at91_can.c +++ b/drivers/net/can/at91_can.c @@ -1123,7 +1123,9 @@ static int at91_open(struct net_device *dev) struct at91_priv *priv = netdev_priv(dev); int err; - clk_enable(priv->clk); + err = clk_prepare_enable(priv->clk); + if (err) + return err; /* check or determine and set bittime */ err = open_candev(dev); @@ -1149,7 +1151,7 @@ static int at91_open(struct net_device *dev) out_close: close_candev(dev); out: - clk_disable(priv->clk); + clk_disable_unprepare(priv->clk); return err; } @@ -1166,7 +1168,7 @@ static int at91_close(struct net_device *dev) at91_chip_stop(dev, CAN_STATE_STOPPED); free_irq(dev->irq, dev); - clk_disable(priv->clk); + clk_disable_unprepare(priv->clk); close_candev(dev);