[PATCH 4.14 55/67] staging: comedi: ni_mio_common: ack ai fifo error interrupts.
From: Greg Kroah-Hartman
Date: Fri Apr 06 2018 - 10:13:32 EST
4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Frank Mori Hess <fmh6jj@xxxxxxxxx>
commit e1d9fc04c41840a4688ef6ce90b6dcca157ea4d7 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/ni_mio_common.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/staging/comedi/drivers/ni_mio_common.c
+++ b/drivers/staging/comedi/drivers/ni_mio_common.c
@@ -1284,6 +1284,8 @@ static void ack_a_interrupt(struct comed
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);
}