4.17-stable review patch. If anyone has any objections, please let me know.
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From: Faiz Abbas faiz_abbas@ti.com
commit 1675bee3e732c2449e792feed9caff804f3bd42c upstream.
pm_runtime_get_sync() returns a 1 if the state of the device is already 'active'. This is not a failure case and should return a success.
Therefore fix error handling for pm_runtime_get_sync() call such that it returns success when the value is 1.
Also cleanup the TODO for using runtime PM for sleep mode as that is implemented.
Signed-off-by: Faiz Abbas faiz_abbas@ti.com Cc: <stable@vger.kernel.org Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/can/m_can/m_can.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -634,10 +634,12 @@ static int m_can_clk_start(struct m_can_ int err;
err = pm_runtime_get_sync(priv->device); - if (err) + if (err < 0) { pm_runtime_put_noidle(priv->device); + return err; + }
- return err; + return 0; }
static void m_can_clk_stop(struct m_can_priv *priv) @@ -1687,8 +1689,6 @@ failed_ret: return ret; }
-/* TODO: runtime PM with power down or sleep mode */ - static __maybe_unused int m_can_suspend(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev);