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mei: amthif: allow only one request at a time 

A next amthif write can be executed only after the previous one has
completed.

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 23:35:25 +02:00 committed by Greg Kroah-Hartman
parent 62e8e6ad60
commit 5cf8b2a9be
1 changed files with 8 additions and 0 deletions
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8
drivers/misc/mei/amthif.c
View File

@ -315,6 +315,14 @@ int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb)
dev = cl->dev;
list_add_tail(&cb->list, &dev->amthif_cmd_list.list);
/*
* The previous request is still in processing, queue this one.
*/
if (dev->iamthif_state > MEI_IAMTHIF_IDLE &&
dev->iamthif_state < MEI_IAMTHIF_READ_COMPLETE)
return 0;
return mei_amthif_run_next_cmd(dev);
}