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| author | Javi Merino <javi.merino@arm.com> | 2015-08-17 20:21:42 +0200 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2015-09-14 05:33:17 +0200 |
| commit | 459ac37506d195713b5e82271a2ac44a777e47df (patch) | |
| tree | 7a3071c20fcaa2b5d11b452b1969359ac722b5e6 /drivers/firmware/memmap.c | |
| parent | thermal: db8500_cpufreq_cooling: Fix module autoload for OF platform driver (diff) | |
| download | linux-459ac37506d195713b5e82271a2ac44a777e47df.tar.xz linux-459ac37506d195713b5e82271a2ac44a777e47df.zip | |
thermal: cpu_cooling: don't call kcalloc() under rcu_read_lock
build_dyn_power_table() allocates the power table while holding
rcu_read_lock. kcalloc using GFP_KERNEL may sleep, so it can't be
called in an RCU read-side path.
Move the rcu protection to the part of the function that really needs
it: the part that handles the dev_pm_opp pointer received from
dev_pm_opp_find_freq_ceil(). In the unlikely case that there is an OPP
added to the cpu while this function is running, return -EAGAIN.
Fixes: c36cf0717631 ("thermal: cpu_cooling: implement the power cooling device API")
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/firmware/memmap.c')
0 files changed, 0 insertions, 0 deletions