Viresh Kumar 0c35ab58c5 opp: Prevent memory leak in dev_pm_opp_attach_genpd() ...

[ Upstream commit cb60e9602c ]

If dev_pm_opp_attach_genpd() is called multiple times (once for each CPU
sharing the table), then it would result in unwanted behavior like
memory leak, attaching the domain multiple times, etc.

Handle that by checking and returning earlier if the domains are already
attached. Now that dev_pm_opp_detach_genpd() can get called multiple
times as well, we need to protect that too.

Note that the virtual device pointers aren't returned in this case, as
they may become unavailable to some callers during the middle of the
operation.

Reported-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2020-10-29 10:08:24 +01:00

..

core.c

opp: Prevent memory leak in dev_pm_opp_attach_genpd()

2020-10-29 10:08:24 +01:00

cpu.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19 17:09:55 +02:00

debugfs.c

opp: Expose bandwidth information via debugfs

2020-05-29 10:15:12 +05:30

Kconfig

treewide: replace '---help---' in Kconfig files with 'help'

2020-06-14 01:57:21 +09:00

Makefile

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21 10:50:46 +02:00

of.c

opp: Increase parsed_static_opps in _of_add_opp_table_v1()

2020-07-16 08:50:54 +05:30

opp.h

opp: Don't drop reference for an OPP table that was never parsed

2020-09-09 19:14:19 +02:00

ti-opp-supply.c

remove ioremap_nocache and devm_ioremap_nocache

2020-01-06 09:45:59 +01:00