kernel/linux.git/drivers/misc/mei/client.h, branch linux-4.4.y

mei: protect mei_cl_mtu from null dereference

2020-11-18T17:25:01+00:00

commit bcbc0b2e275f0a797de11a10eff495b4571863fc upstream. A receive callback is queued while the client is still connected but can still be called after the client was disconnected. Upon disconnect cl->me_cl is set to NULL, hence we need to check that ME client is not-NULL in mei_cl_mtu to avoid null dereference. Cc: Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20201029095444.957924-2-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: bus: export client protocol version

2015-09-21T02:30:10+00:00

export me client protocol version to sysfs and uevent Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: implement fasync for event notification

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

A process can be informed about client notification also via SIGIO with POLL_PRI event. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: add a handler that waits for notification on event

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

mei_cl_notify_get is to be called by a host client to wait, receive, and ack the event notification. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin 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: 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: replace check for connection instead of transitioning

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

The function mei_cl_is_transitioning is just opposite of mei_cl_is_connected. What we actually wanted to check is if we lost connection so we can discard the check for transition and check for 'not connected' Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman