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mei: clean write queues and wake waiters on disconnect

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Clean write and write_waiting queues in disconnect.
Requests in those queues are stale and processing will lead to
fat warnings.

In multi thread operations on disconnect and in FW disconnect case -
write/read/event waiters should end wait and return error.
Wake all waiters for disconnecting client to achieve that.

Drop wake all and write queue clean on reset,
as now we waking all waiters and cleaning write queues on disconnect.
No need to do it twice.

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
2016-02-07 23:35:35 +02:00
committed by Greg Kroah-Hartman
parent 0faf6a3bba
commit a4307fe45a
3 changed files with 30 additions and 48 deletions
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5
drivers/misc/mei/init.c
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@@ -148,13 +148,8 @@ int mei_reset(struct mei_device *dev)
state != MEI_DEV_POWER_UP) {
/* remove all waiting requests */
mei_cl_all_write_clear(dev);
mei_cl_all_disconnect(dev);
/* wake up all readers and writers so they can be interrupted */
mei_cl_all_wakeup(dev);
/* remove entry if already in list */
dev_dbg(dev->dev, "remove iamthif from the file list.\n");
mei_cl_unlink(&dev->iamthif_cl);