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mei: drop amthif internal client

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AMTHIF has special support in the mei drive, it handles multiplexing
multiple user space connection above single me client connection.
Since there is no additional addressing information there is a strict
requirement on the traffic order on each connection and on the "read
after write" order within the connection. This creates a lot of
complexity mostly because the other client types do not necessarily fall
under the same restriction.    After carefully studying the use of the
AMTHIF client, we came to conclusion that the multiplexing is not really
utilized by any application and we may safely remove that support and
significantly simplify the driver.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin
2017-03-20 15:04:03 +02:00
committed by Greg Kroah-Hartman
parent 5c4c0106e9
commit 394a77d0bb
9 changed files with 15 additions and 507 deletions
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14
drivers/misc/mei/init.c
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@@ -146,18 +146,9 @@ int mei_reset(struct mei_device *dev)
/* fall through and remove the sw state even if hw reset has failed */
/* no need to clean up software state in case of power up */
if (state != MEI_DEV_INITIALIZING &&
state != MEI_DEV_POWER_UP) {
/* remove all waiting requests */
if (state != MEI_DEV_INITIALIZING && state != MEI_DEV_POWER_UP)
mei_cl_all_disconnect(dev);
/* remove entry if already in list */
dev_dbg(dev->dev, "remove iamthif from the file list.\n");
mei_cl_unlink(&dev->iamthif_cl);
mei_amthif_reset_params(dev);
}
mei_hbm_reset(dev);
dev->rd_msg_hdr = 0;
@@ -401,9 +392,6 @@ void mei_device_init(struct mei_device *dev,
INIT_WORK(&dev->reset_work, mei_reset_work);
INIT_WORK(&dev->bus_rescan_work, mei_cl_bus_rescan_work);
INIT_LIST_HEAD(&dev->iamthif_cl.link);
INIT_LIST_HEAD(&dev->amthif_cmd_list);
bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
dev->open_handle_count = 0;