diff options
| author | Bharat Nihalani <bnihalani@nvidia.com> | 2014-05-31 11:33:10 +0530 |
|---|---|---|
| committer | Mandar Padmawar <mpadmawar@nvidia.com> | 2014-06-05 01:56:07 -0700 |
| commit | 6b764a9234a34c9815dcaba880c137791c19163a (patch) | |
| tree | 5361bb1fa5a79c566b68afeb85f6a39c0eef0467 /arch/arm64 | |
| parent | 0e04f44cafcd0affacd64b640b7f31a2e38d3c38 (diff) | |
ARM64: kernel: Power off in atomic context
This far the device has been powered off in non-atomic context.
This caused unexpected results when the kernel pre-empted the
power off sequence and started running some completely unrelated
task at the very same time. In addition, IRQs were enabled all
time allowing spontaneous interruption of the power off sequence.
This patch modifies the power off to happen in atomic context.
Original author for same change http://git-master/r/#/c/329636/
done for ARM kernel is Arto Merilainen <amerilainen@nvidia.com>
Bug 200007891
Change-Id: I9dfd5523ed838e3c181ef94dcbbb15e3b66419d1
Signed-off-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-on: http://git-master/r/418215
GVS: Gerrit_Virtual_Submit
Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kernel/process.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 3e4d03cb086f..6f739d2df19d 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -130,6 +130,10 @@ void machine_halt(void) void machine_power_off(void) { + /* Disable interrupts and preemption */ + local_irq_disable(); + preempt_disable(); + machine_shutdown(); if (pm_power_off) pm_power_off(); |