diff options
| author | Todd Poynor <toddpoynor@google.com> | 2012-12-20 15:51:00 -0800 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@nxp.com> | 2016-01-14 11:02:55 -0600 |
| commit | 92c46fda4711861d9f74de5963e17d423fd69efb (patch) | |
| tree | 35b65e93e0293068f9acbefe1dbf7c388ad3dcfd /Documentation/cpu-freq | |
| parent | 2e118d6cff4119be721f7878e5812a40cc52127a (diff) | |
cpufreq: interactive: fix race on timer restart on governor start
Starting the governor, or restarting on a hotplugged-in CPU, can race
with the timer start in idle, triggering a BUG on timer already pending.
Start the timer before setting the enable flag, and use enable_sem to
protect the sequence (and ensure correct order of the update to the
enable flag). Delete any existing timer for safety.
Change-Id: Ife77cf9fe099e8fd8543224cbf148c6722c2ffb0
Reported-by: Francisco Franco <francisco.franco@cloudcar.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Diffstat (limited to 'Documentation/cpu-freq')
0 files changed, 0 insertions, 0 deletions