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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 <davidcdueck@googlemail.com>
Signed-off-by: Anthony Harivel <anthony.harivel@emtrion.de>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
David Dueck 2014-09-17 14:26:48 +02:00 committed by Marc Kleine-Budde
parent 4c728d804c
commit e77980e50b
1 changed files with 5 additions and 3 deletions
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8
drivers/net/can/at91_can.c
View File

@ -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);