mei: allow read concurrency
Replace clunky read state machine with read stack
implemented as per client read list, this is important
mostly for mei drivers with unsolicited reads
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 1a0f6e9..f066ecd 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -231,9 +231,9 @@
* @me_client_id: me/fw id
* @mei_flow_ctrl_creds: transmit flow credentials
* @timer_count: watchdog timer for operation completion
- * @reading_state: state of the rx
* @writing_state: state of the tx
- * @read_cb: current pending reading callback
+ * @rd_pending: pending read credits
+ * @rd_completed: completed read
*
* @device: device on the mei client bus
* @device_link: link to bus clients
@@ -251,9 +251,9 @@
u8 me_client_id;
u8 mei_flow_ctrl_creds;
u8 timer_count;
- enum mei_file_transaction_states reading_state;
enum mei_file_transaction_states writing_state;
- struct mei_cl_cb *read_cb;
+ struct list_head rd_pending;
+ struct list_head rd_completed;
/* MEI CL bus data */
struct mei_cl_device *device;
@@ -425,7 +425,6 @@
* @cdev : character device
* @minor : minor number allocated for device
*
- * @read_list : read completion list
* @write_list : write pending list
* @write_waiting_list : write completion list
* @ctrl_wr_list : pending control write list
@@ -501,7 +500,6 @@
struct cdev cdev;
int minor;
- struct mei_cl_cb read_list;
struct mei_cl_cb write_list;
struct mei_cl_cb write_waiting_list;
struct mei_cl_cb ctrl_wr_list;