Commit 227619c3 authored by Patrik Flykt's avatar Patrik Flykt Committed by Marc Kleine-Budde

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: default avatarPatrik Flykt <patrik.flykt@linux.intel.com>
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: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent c9f4cad6
......@@ -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;
}
......
......@@ -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;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment