When driver wakes up the firmware from the low power state,
it is sending a memory ready message.
The send is done via synchronous/blocking function to ensure
that firmware is in ready state. However, in case of firmware
undergoing reset send might be block forever.
To address this issue a timeout is added to blocking
write command on the internal bus.
Introduce the __mei_cl_send_timeout function to use instead of
__mei_cl_send in cases where timeout is required.
The mei_cl_write has only two callers and there is no need to split
it into two functions.
V2: address review comments:
- split __mei_cl_send and __mei_cl_send_timeout
- add units to timeout KDoc
- use MAX_SCHEDULE_TIMEOUT to squash wait to one macro
V3: - split the state fix into separate patch
- document define unit
- expand timeout KDoc
Alexander Usyskin (2):
mei: add timeout to send
mei: bus-fixup: change pxp mode only if message was sent
drivers/misc/mei/bus-fixup.c | 14 +++++++++-----
drivers/misc/mei/bus.c | 22 +++++++++++++++++++++-
drivers/misc/mei/client.c | 20 ++++++++++++++++----
drivers/misc/mei/client.h | 2 +-
drivers/misc/mei/main.c | 2 +-
drivers/misc/mei/mei_dev.h | 2 ++
6 files changed, 50 insertions(+), 12 deletions(-)
--
2.34.1
