*** ec.c	2011-03-15 02:20:32.000000000 +0100
--- ec_patched.c	2011-09-25 09:21:29.360422000 +0200
***************
*** 223,228 ****
--- 223,229 ----
  				if (ec_transaction_done(ec))
  					return 0;
  			} else {
+ 				msleep(1);
  				if (wait_event_timeout(ec->wait,
  						ec_transaction_done(ec),
  						msecs_to_jiffies(1)))
***************
*** 230,237 ****
  			}
  			advance_transaction(ec, acpi_ec_read_status(ec));
  		} while (time_before(jiffies, delay));
! 		if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
! 			break;
  		pr_debug(PREFIX "controller reset, restart transaction\n");
  		spin_lock_irqsave(&ec->curr_lock, flags);
  		start_transaction(ec);
--- 231,238 ----
  			}
  			advance_transaction(ec, acpi_ec_read_status(ec));
  		} while (time_before(jiffies, delay));
! //		if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
! //			break;
  		pr_debug(PREFIX "controller reset, restart transaction\n");
  		spin_lock_irqsave(&ec->curr_lock, flags);
  		start_transaction(ec);
***************
*** 268,273 ****
--- 269,284 ----
  	return (status & ACPI_EC_FLAG_IBF) == 0;
  }
  
+ /* try to clean input buffer with burst_disable transaction */
+ static int acpi_ec_clean_buffer(struct acpi_ec *ec)
+ {
+ 	struct transaction t = {.command = ACPI_EC_BURST_DISABLE,
+ 				.wdata = NULL, .rdata = NULL,
+ 				.wlen = 0, .rlen = 0};
+ 	return acpi_ec_transaction_unlocked(ec, &t);
+ }
+ 
+ 
  static int ec_wait_ibf0(struct acpi_ec *ec)
  {
  	unsigned long delay = jiffies + msecs_to_jiffies(ec_delay);
***************
*** 276,282 ****
  		if (wait_event_timeout(ec->wait, ec_check_ibf0(ec),
  					msecs_to_jiffies(1)))
  			return 0;
! 	return -ETIME;
  }
  
  static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
--- 287,294 ----
  		if (wait_event_timeout(ec->wait, ec_check_ibf0(ec),
  					msecs_to_jiffies(1)))
  			return 0;
! //	return -ETIME;
! 	return acpi_ec_clean_buffer(ec);
  }
  
  static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)