From e1d9fc04c41840a4688ef6ce90b6dcca157ea4d7 Mon Sep 17 00:00:00 2001
From: Frank Mori Hess <fmh6jj@gmail.com>
Date: Thu, 15 Mar 2018 10:25:44 +0000
Subject: [PATCH] staging: comedi: ni_mio_common: ack ai fifo error interrupts.
Git-commit: e1d9fc04c41840a4688ef6ce90b6dcca157ea4d7
Patch-mainline: v4.17-rc1
References: bsc#1051510
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@vger.kernel.org> # v4.2+
Signed-off-by: Frank Mori Hess <fmh6jj@gmail.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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);
}