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| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2015-05-04 09:43:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-24 21:13:48 +0300 |
| commit | a03d77f6ed7dc74d6244e4d8681ba669d7c414aa (patch) | |
| tree | 2f4bebc9c73a30b16017bda5cd532aec4ada2ef3 /drivers/misc/mei/mei_dev.h | |
| parent | d49ed64a6e3f73975b7eb570c4ea8f37e87d7e5d (diff) | |
| download | linux-a03d77f6ed7dc74d6244e4d8681ba669d7c414aa.tar.xz | |
mei: fix flow control for single buffer clients
For ME clients that use single receiving buffer
the driver tracks credentials on mei_me_clients structure
for all connections. The driver needs to book keep the shared
resource correctly and track the connections, particularly
the credit has to be cleaned when there is no active connection
to a particular me client. This solves issue when subsequent
connection will not get an ill impression that it can write.
We add active connection counter the particular ME client and
when the counter reach zero, we clear the credits.
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>
Diffstat (limited to 'drivers/misc/mei/mei_dev.h')
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 87db0976671c..96c0290da5fb 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -177,6 +177,8 @@ struct mei_fw_status { * @props: client properties * @client_id: me client id * @mei_flow_ctrl_creds: flow control credits + * @connect_count: number connections to this client + * @reserved: reserved */ struct mei_me_client { struct list_head list; @@ -184,6 +186,8 @@ struct mei_me_client { struct mei_client_properties props; u8 client_id; u8 mei_flow_ctrl_creds; + u8 connect_count; + u8 reserved; }; |