Mike Leach 9b6a3f3633 coresight: etmv4: Fix CPU power management setup in probe() function ... The current probe() function calls a pair of cpuhp_xxx API functions to setup CPU hotplug handling. The hotplug lock is held for the duration of the two calls and other CPU related code using cpus_read_lock() / cpus_read_unlock() calls. The problem is that on error states, goto: statements bypass the cpus_read_unlock() call. This code has increased in complexity as the driver has developed. This patch introduces a pair of helper functions etm4_pm_setup_cpuslocked() and etm4_pm_clear() which correct the issues above and group the PM code a little better. The two functions etm4_cpu_pm_register() and etm4_cpu_pm_unregister() are dropped as these call cpu_pm_register_notifier() / ..unregister_notifier() dependent on CONFIG_CPU_PM - but this define is used to nop these functions out in the pm headers - so the wrapper functions are superfluous. Fixes: f188b5e76a ("coresight: etm4x: Save/restore state across CPU low power states") Fixes: e9f5d63f84 ("hwtracing/coresight-etm4x: Use cpuhp_setup_state_nocalls_cpuslocked()") Fixes: 58eb457be0 ("hwtracing/coresight-etm4x: Convert to hotplug state machine") Signed-off-by: Mike Leach <mike.leach@linaro.org> Cc: stable <stable@vger.kernel.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20200701160852.2782823-3-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-07-01 18:45:34 +02:00
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coresight	coresight: etmv4: Fix CPU power management setup in probe() function	2020-07-01 18:45:34 +02:00
intel_th	intel_th: msu: Make stopping the trace optional	2020-03-24 13:45:24 +01:00
stm	stm class: Replace zero-length array with flexible-array	2020-06-15 23:08:32 -05:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00