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Sudeep Holla c7ca61734b PM / Domains: defer dev_pm_domain_set() until genpd->attach_dev succeeds if present

commit 975e83cfb8 upstream.

If the genpd->attach_dev or genpd->power_on fails, genpd_dev_pm_attach
may return -EPROBE_DEFER initially. However genpd_alloc_dev_data sets
the PM domain for the device unconditionally.

When subsequent attempts are made to call genpd_dev_pm_attach, it may
return -EEXISTS checking dev->pm_domain without re-attempting to call
attach_dev or power_on.

platform_drv_probe then attempts to call drv->probe as the return value
-EEXIST != -EPROBE_DEFER, which may end up in a situation where the
device is accessed without it's power domain switched on.

Fixes: f104e1e5ef (PM / Domains: Re-order initialization of generic_pm_domain_data)
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-08-06 19:19:42 -07:00

opp

PM / OPP: Initialize u_volt_min/max to a valid value

2016-05-04 14:48:51 -07:00

clock_ops.c

Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2015-11-10 15:00:03 -08:00

common.c

PM: Convert dev_pm_put_subsys_data() into a void function

2015-02-03 22:59:25 +01:00

domain_governor.c

PM / Domains: Validate cases of a non-bound driver in genpd governor