summaryrefslogtreecommitdiffstats
path: root/kernel/power
diff options
context:
space:
mode:
authorSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>2013-07-12 03:45:37 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-07-15 01:31:36 +0200
commitaae760ed21cd690fe8a6db9f3a177ad55d7e12ab (patch)
tree7dce6578c129597fe471f2e40fd41c0a7b4b4f33 /kernel/power
parentad81f0545ef01ea651886dddac4bef6cec930092 (diff)
cpufreq: Revert commit a66b2e to fix suspend/resume regression
commit a66b2e (cpufreq: Preserve sysfs files across suspend/resume) has unfortunately caused several things in the cpufreq subsystem to break subtly after a suspend/resume cycle. The intention of that patch was to retain the file permissions of the cpufreq related sysfs files across suspend/resume. To achieve that, the commit completely removed the calls to cpufreq_add_dev() and __cpufreq_remove_dev() during suspend/resume transitions. But the problem is that those functions do 2 kinds of things: 1. Low-level initialization/tear-down that are critical to the correct functioning of cpufreq-core. 2. Kobject and sysfs related initialization/teardown. Ideally we should have reorganized the code to cleanly separate these two responsibilities, and skipped only the sysfs related parts during suspend/resume. Since we skipped the entire callbacks instead (which also included some CPU and cpufreq-specific critical components), cpufreq subsystem started behaving erratically after suspend/resume. So revert the commit to fix the regression. We'll revisit and address the original goal of that commit separately, since it involves quite a bit of careful code reorganization and appears to be non-trivial. (While reverting the commit, note that another commit f51e1eb (cpufreq: Fix cpufreq regression after suspend/resume) already reverted part of the original set of changes. So revert only the remaining ones). Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Paul Bolle <pebolle@tiscali.nl> Cc: 3.10+ <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
0 files changed, 0 insertions, 0 deletions