kernel.git/drivers/misc/mei/main.c, branch linux-4.10.y

mei: remove support for broken parallel read

2017-03-12T05:44:13Z

commit cb97fbbcac15982406e0c74cd5512a8b6fcf10b3 upstream. Parallel reads from multiple threads on a file descriptor are not well defined and racy. It is safer to return to original behavior and simply fail the additional read. The solution is to remove request for next read credit. Fixes: ff1586a7ea57 ("mei: enqueue consecutive reads") Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: enable to set the internal flag for client write

2016-11-10T12:18:02Z

Prepare the client write functions to set the internal flag in message header. Carry both blocking and internal modes inside the transmit cb, and call internal bus function __mei_cl_send() with send mode bit mask. The Internal flag should be added only on messages generated by the driver. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: show the HBM protocol versions in the device attributes

2016-10-31T10:00:09Z

The HBM protocol version is negotiated during the setup phase, then settled on a highest possible common version of the driver and the firmware. The sysfs API advertises both negotiated and driver supported versions in the device attributes. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: amthif: drop mei_amthif_read

2016-08-30T12:39:42Z

mei_amthif_read have only one difference from mei_read, it is not calling mei_read_start(). Make mei_read_start return immediately for amthif client and drop the special mei_amthif_read function. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: enqueue consecutive reads

2016-08-30T12:39:42Z

The FW supports only one pending read per host client, in order to support issuing of consecutive reads the driver queues read requests internally and send them to the firmware after pending one has completed. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: add wrapper for queuing control commands.

2016-08-30T12:39:42Z

Enclose the boiler plate code of allocating a control/hbm command cb and enqueueing it onto ctrl_wr.list in a convenient wrapper mei_cl_enqueue_ctrl_wr_cb(). This is a preparatory patch for enabling consecutive reads. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: add file pointer to the host client structure

2016-08-30T12:36:39Z

Store the file associated with a client in the host client structure, this enables dropping the special amthif client file pointer from struct mei_device, and this is also a preparation for changing the way rx packet allocation for fixed_address clients Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: fix return value on disconnection

2016-08-30T12:36:39Z

Correct errno on client disconnection is -ENODEV not -EBUSY Cc: #4.3+ Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman

mei: drop read complete queue emptiness check

2016-08-30T12:36:39Z

In the course of the read flow we want to wait for read completion only if the read queue is empty. However the calling list_empty(&cl->rd_completed) is a duplication as the same check was performed by mei_cl_read_cb() and the waiting is skipped if it returns not NULL. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: amthif: enable poll for async events

2016-08-30T12:35:14Z

Currently the poll function is bailing early for amthif client and ignores requests for async events notifications. Move async event processing before amthif to enable async events notifications on amthif client. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman