linux-toradex.git/drivers/misc/mei/wd.c, branch v3.17.4

mei: set connecting state just upon connection request is sent to the fw

2014-05-03T23:21:56+00:00

Adding power gating introduced new waiting state for client also during
connection attempt, a connection request can be queued for later either due
device is power gated or due to other on going connection.
We setting client connection state before start of full connect procedure so
in both cased the client state will be MEI_FILE_CONNECTING
which create interlock between the two connection attempts, both
detecting that another connection is in progress.

The interlock is resolved by moving client to connecting state
only upon connection request transmission, so the  first
cb in queue can be processed.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: make me hw headers private to me hw.

2014-03-17T22:53:27+00:00

Remove includes of me-hw.h and me-hw-regs.h headers from
the mei generic code.
The mei layer should not depend on hw specific headers

Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: wd: fix stop completion failure

2014-02-28T23:15:57+00:00

While running Documentation/watchdog/src/watchdog-simple.c
and quiting by Ctrl-C, fallowing error is displayed:
mei_me 0000:00:16.0: wd: stop failed to complete ret=-512.

The whatchdog core framework is not able to propagate
-ESYSRESTART or -EINTR. Also There is no much sense in
restarting the close system call so instead of using
wait_event_interruptible_timeout we can use wait_event_timeout
with reasonable 10 msecs timeout.

Reported-by: Prarit Bhargava 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: wd: simplify wd_send command

2014-02-28T23:15:57+00:00

Add reduce credits to wd_send to remove code
repetition and simplify error handling

Signed-off-by: Tomas Winkler 
Signed-off-by: Alexander Usyskin 
Signed-off-by: Greg Kroah-Hartman

mei: make return values consistent across the driver

2014-02-28T23:15:57+00:00

1. Propagate ENOTTY  to user space if the client is not present
in the system
2. Use ETIME consistently on timeouts
3. Return EIO on write failures
4. Return ENODEV on recoverable device failures such as resets

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: add mei_hbuf_acquire wrapper

2014-02-28T23:15:56+00:00

A client has to acquire host buffer
before writing, we add lock like wrapper
to replace the code snippet

if (dev->hbuf_is_ready)
        dev->hbuf_is_ready = false;

Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: wd and amthif use mei_cl_ api for dis/connection

2014-02-18T18:05:07+00:00

Connect wd and amthif through regular mei_cl_connect API
as there is no reason to connect in asynchronous mode.
Also use mei_cl_is_connected in order to protect flows
instead of depending on wd_pending and amthif_timer

Now we can remove all the special handling in hbm layer

Signed-off-by: Tomas Winkler 
Signed-off-by: Alexander Usyskin 
Signed-off-by: Greg Kroah-Hartman

mei: enable marking internal commands

2013-12-19T00:39:54+00:00

Set hbm header bit 30 for internal commands
This mark commands that are generated by
the device driver

Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: wd: host_init propagate error codes from called functions

2013-10-29T23:20:43+00:00

Propagate error codes from called functions, they are correct.

Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: deprecate the mei_wd_state_independence_msg

2013-05-30T12:44:41+00:00

wd independence is deprecated, remove it.

Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman