[PATCH 0/4] tty/serial: atmel: rework tasklets and shutdown sequence

Nicolas Ferre nicolas.ferre at atmel.com
Fri Jun 17 03:05:45 PDT 2016

We experienced some issues with how the atmel_serial driver was dealing with
First, a single tasklet was used for both RX and TX paths which was leading to
calling DMA residue checking routines frequently without reason. So I split the
RX and TX paths with one tasklet for each.
Secondly, as we experienced some deadlocks, I reinforced the shutdown function
of this driver by following the recommended sequence that is described

The first 3 patches have already been posted on May 12th. The 4th patch is
built on top of them, this is why make a series with them...


Ludovic Desroches (1):
  tty/serial: atmel: add comment for the ring buffer size macro

Nicolas Ferre (3):
  tty/serial: atmel: re-integrate status check in irq handler
  tty/serial: atmel: split tx and rx paths
  tty/serial: atmel: enforce tasklet init and termination sequences

 drivers/tty/serial/atmel_serial.c | 129 +++++++++++++++++++++++---------------
 1 file changed, 78 insertions(+), 51 deletions(-)


More information about the linux-arm-kernel mailing list