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| author | Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> | 2012-06-16 15:30:45 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-07-01 13:31:22 +0200 |
| commit | 443772d408a25af62498793f6f805ce3c559309a (patch) | |
| tree | f89e50547524bbb275d38b8a39b1e4d82a18c22d /drivers/base | |
| parent | PM / Hibernate: Enable suspend to both for in-kernel hibernation. (diff) | |
| download | linux-443772d408a25af62498793f6f805ce3c559309a.tar.xz linux-443772d408a25af62498793f6f805ce3c559309a.zip | |
ftrace: Disable function tracing during suspend/resume and hibernation, again
If function tracing is enabled for some of the low-level suspend/resume
functions, it leads to triple fault during resume from suspend, ultimately
ending up in a reboot instead of a resume (or a total refusal to come out
of suspended state, on some machines).
This issue was explained in more detail in commit f42ac38c59e0a03d (ftrace:
disable tracing for suspend to ram). However, the changes made by that commit
got reverted by commit cbe2f5a6e84eebb (tracing: allow tracing of
suspend/resume & hibernation code again). So, unfortunately since things are
not yet robust enough to allow tracing of low-level suspend/resume functions,
suspend/resume is still broken when ftrace is enabled.
So fix this by disabling function tracing during suspend/resume & hibernation.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base')
0 files changed, 0 insertions, 0 deletions