tree 4d37a3caccb9ba2545535f0431e6638d2d685a70
parent 903079a54cac47ab115fa5abbde6860cf94e258f
author Tomas Winkler <tomas.winkler@intel.com> 1616047199 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1616508915 +0100

mei: allow map and unmap of client dma buffer only for disconnected client

Allow map and unmap of the client dma buffer only when the client is not
connected. The functions return -EPROTO if the client is already connected.
This is to fix the race when traffic may start or stop when buffer
is not available.

Cc: <stable@vger.kernel.org> #v5.11+
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20210318055959.305627-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>