kernel/linux.git/drivers/misc/mei/interrupt.c, branch v4.4.89

mei: amthif: discard not read messages

2016-06-01T19:15:50+00:00

commit 9d04ee11db7bf0d848266cbfd7db336097a0e239 upstream. When a message is received and amthif client is not in reading state the message is ignored and left dangling in the queue. This may happen after one of the amthif host connections is closed w/o completing the reading. Another client will pick up a wrong message on next read attempt which will lead to link reset. To prevent this the driver has to properly discard the message when amthif client is not in reading state. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: fix NULL dereferencing during FW initiated disconnection

2016-06-01T19:15:50+00:00

commit 6a8d648c8d1824117a9e9edb948ed1611fb013c0 upstream. In the case when disconnection is initiated from the FW the driver is flushing items from the write control list while iterating over it: mei_irq_write_handler() list_for_each_entry_safe(ctrl_wr_list) <-- outer loop mei_cl_irq_disconnect_rsp() mei_cl_set_disconnected() mei_io_list_flush(ctrl_wr_list) <-- destorying list We move the list flushing to the completion routine. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: keep the device awake during reads in chunks

2015-10-18T04:45:05+00:00

Long messages are read in chunks, to prevent trashing runtime pm between the reading of the chunks we call pm_runtime_mark_last_busy() on non-final chunk message as the next chunk of the same message will be received immediately in the next interrupt with high probablity. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: add mei_cl_notify_request command

2015-08-04T00:30:00+00:00

Add per client notification request infrastructure that allows client to enable or disable async event notification. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman

mei: disconnect on connection request timeout

2015-08-04T00:25:51+00:00

For the FW with HBM version >= 2.0 we don't need to reset the whole device in case of a particular client failing to connect, it is enough to send disconnect a request to bring the device to the stable state. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: support for fixed address clients

2015-05-24T18:13:48+00:00

Fixed address is simplified FW client that doesn't require connection and doesn't support flow control. So it can be only one host client per fixed FW client. Fixed client access is available only for drivers on mei bus, connection from user-space is blocked. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: add a reference from the host client to the me client

2015-05-24T18:13:10+00:00

Keep a pointer to associated me client in the host client object to eliminate me client searches. Check if the me client is active in the firmware by checking if its is linked on the me clients list Add accessors for the me client properties from host client. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: revamp client connection

2015-05-24T18:13:10+00:00

Simplify connect state machine by changing the logic around Connection request in progress - only check if we have a callback in relevant queue. Extract common code into mei_cl_send_connect() function Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman

mei: revamp client disconnection flow

2015-05-24T18:13:10+00:00

Split disconnected state into two parts first reception disconnect response from the firmware and second actually setting of disconnected state. Book keeping data are needed for processing and after firmware disconnected the client and are cleaned when setting the disconnected state in mei_cl_set_disconneted() function. Add mei_cl_send_disconnect to reduce code duplication. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman

mei: use mei_cl_is_connected consistently

2015-04-03T14:18:56+00:00

Replace open coded check for cl->state !=/== MEI_FILE_CONNECTED with mei_cl_is_connected function. Note that cl->state != MEI_FILE_CONNECTED is not the same as cl->state == MEI_FILE_DISCONNECTED Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman