diff options
| author | Sudeep Holla <[email protected]> | 2015-01-08 06:29:04 +0000 |
|---|---|---|
| committer | Daniel Lezcano <[email protected]> | 2015-01-23 15:05:48 +0100 |
| commit | 194fe6f28e2819d3f50fbed24c3b72f21501dbfa (patch) | |
| tree | e76c25ad91ead6ba5d1caaf462c5862888fa691c /lib/memory-notifier-error-inject.c | |
| parent | ec6f34e5b552fb0a52e6aae1a5afbbb1605cc6cc (diff) | |
drivers: cpuidle: Don't initialize big.LITTLE driver if MCPM is unavailable
If big.LITTLE driver is initialized even when MCPM is unavailable,
we get the below warning the first time cpu tries to enter deeper
C-states.
------------[ cut here ]------------
WARNING: CPU: 4 PID: 0 at kernel/arch/arm/common/mcpm_entry.c:130 mcpm_cpu_suspend+0x6d/0x74()
Modules linked in:
CPU: 4 PID: 0 Comm: swapper/4 Not tainted 3.19.0-rc3-00007-gaf5a2cb1ad5c-dirty #11
Hardware name: ARM-Versatile Express
[<c0013fa5>] (unwind_backtrace) from [<c001084d>] (show_stack+0x11/0x14)
[<c001084d>] (show_stack) from [<c04fe7f1>] (dump_stack+0x6d/0x78)
[<c04fe7f1>] (dump_stack) from [<c0020645>] (warn_slowpath_common+0x69/0x90)
[<c0020645>] (warn_slowpath_common) from [<c00206db>] (warn_slowpath_null+0x17/0x1c)
[<c00206db>] (warn_slowpath_null) from [<c001cbdd>] (mcpm_cpu_suspend+0x6d/0x74)
[<c001cbdd>] (mcpm_cpu_suspend) from [<c03c6919>] (bl_powerdown_finisher+0x21/0x24)
[<c03c6919>] (bl_powerdown_finisher) from [<c001218d>] (cpu_suspend_abort+0x1/0x14)
[<c001218d>] (cpu_suspend_abort) from [<00000000>] ( (null))
---[ end trace d098e3fd00000008 ]---
This patch fixes the issue by checking for the availability of MCPM
before initializing the big.LITTLE cpuidle driver
Signed-off-by: Sudeep Holla <[email protected]>
Acked-by: Lorenzo Pieralisi <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Daniel Lezcano <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Diffstat (limited to 'lib/memory-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions