From 227619c3ff7c71eab76848b3b2add06838f5b6e6 Mon Sep 17 00:00:00 2001 From: Patrik Flykt Date: Fri, 23 Oct 2020 14:58:00 +0300 Subject: can: m_can: move runtime PM enable/disable to m_can_platform This is a preparatory patch for upcoming PCI based M_CAN devices. The current PM implementation would cause PCI based drivers to enable PM twice, once when the PCI device is added and a second time in m_can_class_register(). This will cause 'Unbalanced pm_runtime_enable!' to be logged, and is a situation that should be avoided. Therefore, in anticipation of PCI devices, move PM enabling out from M_CAN class registration to its only user, the m_can_platform driver. Signed-off-by: Patrik Flykt Link: https://lore.kernel.org/r/20201023115800.46538-2-patrik.flykt@linux.intel.com [mkl: m_can_plat_probe(): fix error handling m_can_class_register(): simplify error handling] Signed-off-by: Marc Kleine-Budde --- drivers/net/can/m_can/m_can.c | 8 +------- drivers/net/can/m_can/m_can_platform.c | 9 ++++++++- 2 files changed, 9 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 8f389df26afc..06c136961c7c 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1826,10 +1826,9 @@ int m_can_class_register(struct m_can_classdev *m_can_dev) int ret; if (m_can_dev->pm_clock_support) { - pm_runtime_enable(m_can_dev->dev); ret = m_can_clk_start(m_can_dev); if (ret) - goto pm_runtime_fail; + return ret; } ret = m_can_dev_setup(m_can_dev); @@ -1855,11 +1854,6 @@ int m_can_class_register(struct m_can_classdev *m_can_dev) */ clk_disable: m_can_clk_stop(m_can_dev); -pm_runtime_fail: - if (ret) { - if (m_can_dev->pm_clock_support) - pm_runtime_disable(m_can_dev->dev); - } return ret; } diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c index c45a889a1afd..36ef791da388 100644 --- a/drivers/net/can/m_can/m_can_platform.c +++ b/drivers/net/can/m_can/m_can_platform.c @@ -115,8 +115,15 @@ static int m_can_plat_probe(struct platform_device *pdev) m_can_init_ram(mcan_class); - return m_can_class_register(mcan_class); + pm_runtime_enable(mcan_class->dev); + ret = m_can_class_register(mcan_class); + if (ret) + goto out_runtime_disable; + + return ret; +out_runtime_disable: + pm_runtime_disable(mcan_class->dev); probe_fail: m_can_class_free_dev(mcan_class->net); return ret; -- cgit v1.2.3-58-ga151