It's possible the AP could miss an incoming SVC timesync pulse i.e. the AP
could have interrupts switched off for long enough that one SVC GPIO strobe
ends up over-lapping another one. TimeSync should be able to deal with this
type of transitory failure by retrying a failed synchronous TimeSync resync
up to 'n' number of times. For this patch 'n' has been set to five, which
is a hand-wavy choice that 'feels' right.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Instead of using the queue_delayed_work call for delayed work on
system_wq, use the schedule_delayed_work helper to be more consistent on
the style.

Testing Done:
 - Check SVC watchdog is pining after the change.
Signed-off-by: David Lin <dtwlin@google.com>
Reviewed-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

There is an issue that when an interface failed to be enabled due to
timesync failure, a previously added control device is not deleted as
part of the error clean-up. This causes a leak in the sysfs file when
the interface is disabled. This would eventually cause this particular
interface to be unable to register future control device even after
unipro_reset. See failure logs below:

[  906.495261] greybus 1-3.3: failed to add to timesync: -19
[  906.516497] greybus 1-3.3: failed to re-enable interface: -19
[  907.016016] greybus 1-3.3: Interface removed
...
[ 1623.677343] ------------[ cut here ]------------
[ 1623.681116] WARNING: at kernel/arche/fs/sysfs/dir.c:530 sysfs_add_one+0x98/0xb4()
[ 1623.681128] sysfs: cannot create duplicate filename '/bus/greybus/devices/1-3.3.ctrl'
[ 1623.681252] Call trace:
[ 1623.681265] [<ffffffc000207b40>] dump_backtrace+0x0/0x268
[ 1623.681272] [<ffffffc000207db8>] show_stack+0x10/0x1c
[ 1623.681284] [<ffffffc000ccb890>] dump_stack+0x1c/0x28
[ 1623.681295] [<ffffffc00021f9dc>] warn_slowpath_common+0x74/0x9c
[ 1623.681301] [<ffffffc00021fa60>] warn_slowpath_fmt+0x5c/0x80
[ 1623.681307] [<ffffffc000366624>] sysfs_add_one+0x94/0xb4
[ 1623.681315] [<ffffffc0003670b4>] sysfs_do_create_link_sd+0x100/0x1c8
[ 1623.681320] [<ffffffc0003671a8>] sysfs_create_link+0x2c/0x38
[ 1623.681332] [<ffffffc0005d5890>] bus_add_device+0xd8/0x190
[ 1623.681338] [<ffffffc0005d39ec>] device_add+0x2b4/0x604
[ 1623.681349] [<ffffffbffc006dfc>] gb_control_add+0x10/0x40 [greybus]
[ 1623.681362] [<ffffffbffc003dac>] gb_interface_enable+0x20c/0x3b8 [greybus]
[ 1623.681373] [<ffffffbffc002a30>] gb_module_add+0x124/0x174 [greybus]
[ 1623.681385] [<ffffffbffc0082cc>] gb_svc_intf_set_power_mode+0xdd4/0xfe8 [greybus]
[ 1623.681394] [<ffffffc00023888c>] process_one_work+0x268/0x3c8
[ 1623.681400] [<ffffffc000239a64>] worker_thread+0x204/0x358
[ 1623.681410] [<ffffffc00023f43c>] kthread+0xb8/0xc4
[ 1623.681414] ---[ end trace 44489577dd9220db ]---
[ 1623.681818] greybus 1-3.3.ctrl: failed to register control device: -17

Testing Done:
 - Continuous unipro_reset stress test
Signed-off-by: David Lin <dtwlin@google.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Jeffrey Carlyle <jcarlyle@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Fix ARPC active-list corruption due to incorrect list-interface usage.

The corruption manifested itself as ARPC timeouts due to expected
responses not being recognised whenever more than one ARPC was active.

This could be seen for example when two interfaces were being runtime
suspended in parallel:

[  165.739896] usb 1-1.1: invalid arpc response id received: 13
[  165.794743] greybus 1-5.5: gb_interface_refclk_set - 0
[  166.241202] usb 1-1.1: failed to execute ARPC: -110

Fortunately the impact of this bug has so far been limited to such
timeouts and error messages due to ARPC currently only being used for
CPort reset in the connection tear-down path.
Reported-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Add missing le16_to_cpu() to an ARPC error message in the receive path,
and also use %u to print the unsigned id.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The wrong pointer was checked for allocation failures when allocating
the ARPC response buffer, something which would lead to allocation
failures going undetected.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Replace all occurrences of the term "Ara" with "GMP" in core.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Refer to the MDK as GMP MDK.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Inline with other properties used for arche-platform driver,
rename ara,init-disable => arche,init-disable.

Testing Done: Boot tested on EVT2 platform
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Change ARA prefix to GB_CAM for greyus camera specific
formats.

Change-Id: I1a0552516e8ea727c48085c59fc49f2409a89486
Signed-off-by: Gjorgji Rosikopulos <grosikopulos@mm-sol.com>
Signed-off-by: Blagovest Borisov Kolenichev <kolenichev_blagovest@projectara.com>
Acked-by: Laurent Pinchart <laurent.pinchart@linaro.org>

There's an issue that the userspace is not able to control both the
enumerated control and DAPM widget when audio bundle is in the SUSPEND
state. This patch fixes the issue by adding pm_runtime_get/put() calls
for the both controls.

Testing Done:
 - Use tinymix to get and put both enumerated control and DAPM widget as
   the followings, and observe audio bundle is able to wake up from
   suspend.

$ tinymix "GB 3 PB source" 1
$ tinymix "GB 3 PB source"
GB 3 PB source:	AIF1	>AIF2

$ tinymix "GB 3 AIF1_RX MUX" 2
$ tinymix "GB 3 AIF1_RX MUX"
GB 3 AIF1_RX MUX:	Stereo	Left	>Right
Reported-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Signed-off-by: David Lin <dtwlin@google.com>
Reviewed-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Currently, AP performs unipro_reset if SVC fails to response to its
ping. While this error recovery is best suited for the end-user
experience, errors in the UniPro network could potentially go unnoticed
by the QA and fishfooders in the development phase of the project. This
patch adds an option to trigger a kernel panic so logs can be collected
for analysis.

Testing Done:
 - Reproduce issue and observe kernel panic when
   watchdob_control is changed to 'panic'
Signed-off-by: David Lin <dtwlin@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Update documentation and sample application to capture the 'status' byte
in backend version operation and new error types in backend firmware
update operation.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The backend processor may not be ready to return the version of firmware
it is running by the time AP requests for it. The greybus specification
is updated to return 1-byte 'status' to return the error type, RETRY is
one of them.

This patch implements that in greybus now.

Note that the version structure was common across interface and backend
version requests earlier, but that is changing as well.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The specification got updated with two more status values, add their
support in greybus.

As retry isn't really an error, skip printing error messages for it as
well.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

S2 Loader doesn't support runtime PM operations currently and we will
fail to suspend/resume the bundle for firmware management protocols.

Once that happens, the bundle and its connections will be pretty much
useless as we would have tried to disable/enable all connections during
such an operation and the S2 loader doesn't expect the connections to go
away during normal operation (except in the case of mode-switch).

This patch defines a new quirk GB_INTERFACE_QUIRK_NO_PM and uses a new
interface init status value (GB_INIT_S2_LOADER_INITIALIZED) which will
be advertised by S2 Loader now in the init status.

After detecting the currently running stage as S2 Loader, the kernel
wouldn't attempt suspending or resuming the bundle.
Reviewed-by: David Lin <dtwlin@google.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Its a special quirk just for the bootrom as it doesn't have any PM
operations implemented. As the greybus bootrom bundle driver doesn't try
to do any PM stuff, this quirk is used only to skip bundle activate
operation currently.

Rename the GB_INTERFACE_QUIRK_NO_PM quirk to
GB_INTERFACE_QUIRK_NO_BUNDLE_ACTIVATE to suit its purpose better as the
GB_INTERFACE_QUIRK_NO_PM will be used for other quirk now.
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

This patch implements runtime PM support for firmware management bundle.
This guarantees that the bundle will be active, while the AP or the
Module is trying to exchange any operations over any of the CPorts.

- Firmware Management CPort:

  Runtime PM get/put calls are placed around the ioctl calls, which are
  all implemented as blocking ioctls.

- Component Authentication CPort:

  Runtime PM get/put calls are placed around the ioctl calls, which are
  all implemented as blocking ioctls.

- SPI:

  Uses the interface provided by spilib.c and runtime PM get/put are
  called around connection usage.

- firmware-download:

  This is the most tricky one. All operations on this CPort are
  initiated from the Module and not from the AP. And the AP needs to do
  runtime_pm_get() before any request is received over this CPort.

  The module doesn't send any request over this connection, unless the
  AP has requested the module over firmware management CPort to download
  a firmware package over firmware download CPort.

  And so the runtime PM get/put calls around the ioctls in
  fw-management.c are sufficient to handle the firmware management CPort
  as well.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Clean up the incoming request handler somewhat by passing a properly
aligned header and dropping the now redundant id and type parameters.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The response-received tracepoint is currently broken. Instead of parsing
the received message header it was tracing a bunch of zeroed fields from
an uninitialised response buffer.

Fix this by moving the tracepoint after were the response buffer is
initialised.

Fixes: 7cb496e6890e ("greybus: tracing: fix message traces")
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The operation type included in the error message printed for malformed
responses has never been correct. An uninitialised buffer was used to
retrieve the type, resulting in the type always being reported as 0.

Fix this by passing a properly aligned header to the response handler,
and drop the now redundant id and result parameters.

Fixes: cb0ef0c019ab ("operation: print message type on errors")
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Modify HID greybus driver to support runtime PM framework.
The suspend and resume fucntion have been test with tutorial-hid,
e-ink-display and gpbridge-test image by sysfs resume, all HID
buttons work well on suspend/resume.

Testing Done: Compiled and verified on EVT2, DB3.5, GPB test module
              with daughter board, Red module.
Signed-off-by: Philip Yang <yang_philip@projectara.com>
Reviewed-by: David Lin <dtwlin@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The download_firmware() function isn't downloading the firmware but just
finding if one is available or not. The same applies to the error
message printed by it.

Replace 'download' with 'find' to make it sound better.
Reported-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

We set timeouts using gb_bootrom_set_timeout(), which hides the internal
implementation, i.e. workqueues.

While canceling timeouts, we do cancel_delayed_work_sync(), which
exposes the internal implementation and doesn't look that clean.

Create gb_bootrom_cancel_timeout() to hide the internal implementation
here as well.
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

A special race is observed in the case where the phone boots with
modules attached to it.

In that case, the AP processes a later FIRMWARE_SIZE request from the
bootrom, before processing the response to the earlier AP_READY request.
And because of that, we set the timeout from gb_bootrom_probe() after
trying to cancel it from gb_bootrom_firmware_size_request().

And with that, if the firmware package isn't available for the kernel to
directly read from, then we get a timeout print message like below:

[   23.669764] bootrom 1-3.3.1: Firmware file 'ara_00000126_00001001_fffe0001_ffe5001a_s2l.tftf' requested
[   24.680528] bootrom 1-3.3.1: Timed out waiting for Firmware Size Request from the Module

Note that this doesn't happen if the module is inserted into the frame,
after the phone is already booted.

This behavior is the result of an earlier commit cdd1cb3f4943
("operation: add completion work queue").

This perhaps happens only at boot time because the UNBOUND wq
(connection->wq) gets a chance to run on other CPUs, while the BOUND wq
(gb_operation_completion_wq) doesn't at that stage (24 seconds since
boot).

Setting the timeout before sending the AP_READY request fixes it for
now.
Reported-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

On failing to find a firmware image, we get these today:

bootrom 1-3.3.1: Firmware request for ara_00000126_00001001_fffe0001_ffe5001a_s2l.tftf has failed : -12
bootrom 1-3.3.1: gb_bootrom_firmware_size_request: failed to download firmware (-12)

Which are more or less duplicate, as they print error for the same root
cause.

With this patch this is all we get now:

bootrom 1-3.3.1: failed to download ara_00000126_00001001_fffe0001_ffe5001a_s2l.tftf firmware (-12)
Reported-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The currently set value of next_request_type in the error path of
gb_bootrom_firmware_size_request() is not correct, as it should have
been NEXT_REQ_FIRMWARE_SIZE for the failure case (as we should be
waiting for another similar request).

But, if an error occurs in gb_bootrom_firmware_size_request(), then the
ES3 bootrom will never be able to recover from it and send another
request. And so there is no point waiting for another request and timing
out.

Skip doing that in error path.
Reported-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Integrate greybus drivers with the Linux Kernel RuntimePM framework
for vibrator driver.

Testing Done: AP side (kernel) can control the vibrator driver with
suspend and resume.
Signed-off-by: Ann Chen <chen_ann@projectara.com>
Reviewed-by: David Lin <dtwlin@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The new power management specific operations added to the control
protocol do not print the bundle-id in the error messages and it is not
possible to identify which bundle-id the operation failed for.

Fix that and do minor rewriting of the print messages to make them more
readable.

Tested on EVT 2.0 with gpbridge-test module.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Sandeep Patil <sspatil@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

In case of a synchronous operation timeout error, it's helpful for
purpose of debugging to print the operation id in the error message, so
that we know if the response is received at a later time after operation
time out.

Testing Done:
 - Observe the error message below when response comes later after
operation timeout:

[  792.973978] greybus greybus1: 0/0:0: synchronous operation id 0x0005
of type 0x21 failed: -110
[  800.646694] greybus greybus1: 0/0:0: unexpected response id 0x0005
received
Signed-off-by: David Lin <dtwlin@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

It is suggested to avoid using ARA keyword externally. So we need to
update GB codec driver. Also, codec name is currently set to 'gb-codec'.
However, it makes more sense to name it as apb-dummy-codec, since it is
used to control various audio modules connected to APB via greybus.
Signed-off-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

spilib is used by multiple users currently (spi.c and fw-core.c) but
commit aa52b62a0556 broke that hierarchy and introduced gbphy dependent
code in spilib.

This may have unreliable consequences as we are doing following
operation unconditionally now:

	gbphy_dev = to_gbphy_dev(spi->parent);
	gbphy_runtime_get_sync(gbphy_dev);

which may not go well when the parent is of type &bundle->dev
(fw-core.c).

This patch introduces spilib_ops and lets the users of the core register
them. This shall have no functional change for the spi.c usecase and
shall fix the unreliable results for the fw-core.c usecase.

Tested by writing to mtd0 dev and verifying (with print messages) that
the below routines are getting called for a gpbridge-test module.

Fixes: aa52b62a0556 ("spi: Add runtime_pm support")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

It can take arguments not and we can perform all the operations with a
single binary, sorry for missing that initially.

Usage: ./firmware <gb-fw-mgmt-X> <type: interface/backend> <firmware-tag> <timeout>

And all of them have default values, etc.

Tested with a semco 13 MP module.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Currently frametime are being printed whenever an Interface is
runtime-resumed. This is unnecessarily chatty. This patch moves the
frametime print from using pr_info() to dev_dbg().

Testing Done:
 - $ echo "module greybus +p" > /d/dynamic_debug/control

[   97.699395] greybus 1-svc: greybus frametime: ap=2042778707
1-svc=2042775185 greybus1=2042778397 1-6.6=2042778390
Signed-off-by: David Lin <dtwlin@google.com>
Reviewed-by: Jeffrey Carlyle <jcarlyle@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The firmware now keeps the underlying hardware disabled until
receiving the first Bundle Activate request. Additionally: requesting
transition to a state the bundle is already in is no longer an error.

We can now add proper error handling to the bundle activate call.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

We always knew backward compatibility with the ES3 bootrom, which was
finalised about a year ago, would be a pain. Here we go again.

The bootrom does not support control requests added after it was burnt
into ROM for obvious reasons. This means that we need to suppress
sending the new bundle_activate() operation to any interface executing
the legacy bootrom.

Do so by adding a new NO_PM interface quirk (we can use the
control-protocol version for this later once we bump it).

Note that the interface-disable path (e.g. for power down) is already
handled by the FORCED_DISABLE quirk, and that the suspend/resume
paths are currently avoided by making sure that the bootrom bundle
never suspends.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Replace prefix "ara_" with prefix "gmp_" for TFTF firmware filenames.

Testing Done: compiled and flashed EVT2 (bootimage) and tested that
              "gmp_" prefixed tftf files are expected. Pushed one from
	      FDK and checked that it's properly loaded.
Signed-off-by: Joel Porquet <porquet_joel@projectara.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Sandeep Patil <sspatil@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

All interfaces, regardless of type, should have an interface_id
attribute reflecting its position on the frame.

This has been reported to cause an assertion failure in libmoduleutil
for dummy modules.

Testing done: Verified that the attribute is present for registered
dummy interfaces.
Reported-by: Gjorgji Rosikopulos <grosikopulos@mm-sol.com>
Tested-by: Gjorgji Rosikopulos <grosikopulos@mm-sol.com>
Reviewed-by: Patrick Titiano <ptitiano@baylibre.com>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Currently the probe() function contains the asynchronous() variant of
FrameTime synchronization. This patch converts to the synchronous() version
of synchronization. This is required for two reasons first a probe() cannot
reasonably be considered to be complete without successfully completing a
time synchronization for Interfaces that care about that sync. Secondly
scheduling the operation asynchronously means its possible the PM-runtime
suspend() path can execute before the async timesync operation completes.
For both reasons we want to run synchronization - synchronously.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

To make sure tests on all devices, enabled or not, are cancelled,
specify -f when starting new loopback test.
Signed-off-by: Ryan Lim <limryan@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>