mei: amthif: drop iamthif_current_cb

iamthif_current_cb was used in request cancel in amthif code.
Now a canceled request is discarded only at the end of the processing
and the variable lost its purpose and can be safely removed.
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>

drivers/misc/mei/amthif.c

@@ -47,7 +47,6 @@ const uuid_le mei_amthif_guid  = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d,
 void mei_amthif_reset_params(struct mei_device *dev)
 {
 	/* reset iamthif parameters. */
-	dev->iamthif_current_cb = NULL;
 	dev->iamthif_canceled = false;
 	dev->iamthif_state = MEI_IAMTHIF_IDLE;
 	dev->iamthif_stall_timer = 0;
@@ -213,7 +212,6 @@ static int mei_amthif_read_start(struct mei_cl *cl, const struct file *file)
 
 	dev->iamthif_state = MEI_IAMTHIF_READING;
 	dev->iamthif_fp = cb->fp;
-	dev->iamthif_current_cb = cb;
 
 	return 0;
 err:
@@ -240,7 +238,6 @@ static int mei_amthif_send_cmd(struct mei_cl *cl, struct mei_cl_cb *cb)
 	dev = cl->dev;
 
 	dev->iamthif_state = MEI_IAMTHIF_WRITING;
-	dev->iamthif_current_cb = cb;
 	dev->iamthif_fp = cb->fp;
 	dev->iamthif_canceled = false;
 
@@ -407,7 +404,6 @@ void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
 			mei_io_cb_free(cb);
 			return;
 		}
-		dev->iamthif_current_cb = NULL;
 		dev->iamthif_state = MEI_IAMTHIF_IDLE;
 		dev->iamthif_fp = NULL;
 		if (!dev->iamthif_canceled) {
@@ -430,7 +426,6 @@ void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
 			mei_io_cb_free(cb);
 		}
 
-		dev->iamthif_current_cb = NULL;
 		dev->iamthif_stall_timer = 0;
 		mei_amthif_run_next_cmd(dev);
 		break;

drivers/misc/mei/interrupt.c

@@ -515,9 +515,6 @@ void mei_timer(struct work_struct *work)
 			dev_err(dev->dev, "timer: amthif  hanged.\n");
 			mei_reset(dev);
 
-			mei_io_cb_free(dev->iamthif_current_cb);
-			dev->iamthif_current_cb = NULL;
-
 			dev->iamthif_fp = NULL;
 			mei_amthif_run_next_cmd(dev);
 		}

drivers/misc/mei/mei_dev.h

@@ -400,7 +400,6 @@ const char *mei_pg_state_str(enum mei_pg_state state);
  * @amthif_cmd_list : amthif list for cmd waiting
  * @iamthif_fp : file for current amthif operation
  * @iamthif_cl  : amthif host client
- * @iamthif_current_cb : amthif current operation callback
  * @iamthif_open_count : number of opened amthif connections
  * @iamthif_stall_timer : timer to detect amthif hang
  * @iamthif_state : amthif processor state
@@ -485,7 +484,6 @@ struct mei_device {
 	/* driver managed amthif list for reading completed amthif cmd data */
 	const struct file *iamthif_fp;
 	struct mei_cl iamthif_cl;
-	struct mei_cl_cb *iamthif_current_cb;
 	long iamthif_open_count;
 	u32 iamthif_stall_timer;
 	enum iamthif_states iamthif_state;