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authorMarc Kleine-Budde <mkl@pengutronix.de>2014-02-28 17:18:27 +0100
committerMarc Kleine-Budde <mkl@pengutronix.de>2014-03-03 12:41:39 +0100
commitf003698e23f6f56a791774f14d0ac35d04872490 (patch)
treefd6af2b168c5275e05977bbfd4aae5ce051809c5 /drivers
parent9b00b300e7bce032c467c36ca47fe2a776887fc2 (diff)
can: flexcan: factor out transceiver {en,dis}able into seperate functions
This patch moves the transceiver enable and disable into seperate functions, where the NULL pointer check is hidden. Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/can/flexcan.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 5af60ab23e6f..6b0fecd0a6ad 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -264,6 +264,22 @@ static inline void flexcan_write(u32 val, void __iomem *addr)
}
#endif
+static inline int flexcan_transceiver_enable(const struct flexcan_priv *priv)
+{
+ if (!priv->reg_xceiver)
+ return 0;
+
+ return regulator_enable(priv->reg_xceiver);
+}
+
+static inline int flexcan_transceiver_disable(const struct flexcan_priv *priv)
+{
+ if (!priv->reg_xceiver)
+ return 0;
+
+ return regulator_disable(priv->reg_xceiver);
+}
+
static inline int flexcan_has_and_handle_berr(const struct flexcan_priv *priv,
u32 reg_esr)
{
@@ -808,11 +824,9 @@ static int flexcan_chip_start(struct net_device *dev)
if (priv->devtype_data->features & FLEXCAN_HAS_V10_FEATURES)
flexcan_write(0x0, &regs->rxfgmask);
- if (priv->reg_xceiver) {
- err = regulator_enable(priv->reg_xceiver);
- if (err)
- goto out;
- }
+ err = flexcan_transceiver_enable(priv);
+ if (err)
+ goto out;
/* synchronize with the can bus */
reg_mcr = flexcan_read(&regs->mcr);
@@ -857,8 +871,7 @@ static void flexcan_chip_stop(struct net_device *dev)
flexcan_write(priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_ALL,
&regs->ctrl);
- if (priv->reg_xceiver)
- regulator_disable(priv->reg_xceiver);
+ flexcan_transceiver_disable(priv);
priv->can.state = CAN_STATE_STOPPED;
return;