From: Frank Mori Hess <fmh6jj@xxxxxxxxx> Ack ai fifo error interrupts in interrupt handler to clear interrupt after fifo overflow. It should prevent lock-ups after the ai fifo overflows. Cc: <stable@xxxxxxxxxxxxxxx> # v4.2+ Signed-off-by: Frank Mori Hess <fmh6jj@xxxxxxxxx> Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx> --- I have not tested this patch on hardware. -- Frank Mori Hess Applies cleanly to v4.2+, but needs backporting for earlier stable kernels. -- Ian Abbott. --- drivers/staging/comedi/drivers/ni_mio_common.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c index d6eb55b41814..e40a2c0a9543 100644 --- a/drivers/staging/comedi/drivers/ni_mio_common.c +++ b/drivers/staging/comedi/drivers/ni_mio_common.c @@ -1275,6 +1275,8 @@ static void ack_a_interrupt(struct comedi_device *dev, unsigned short a_status) ack |= NISTC_INTA_ACK_AI_START; if (a_status & NISTC_AI_STATUS1_STOP) ack |= NISTC_INTA_ACK_AI_STOP; + if (a_status & NISTC_AI_STATUS1_OVER) + ack |= NISTC_INTA_ACK_AI_ERR; if (ack) ni_stc_writew(dev, ack, NISTC_INTA_ACK_REG); } -- 2.16.1