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Commit e1d9fc04 authored by Frank Mori Hess's avatar Frank Mori Hess Committed by Greg Kroah-Hartman
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staging: comedi: ni_mio_common: ack ai fifo error interrupts. 



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: default avatarFrank Mori Hess <fmh6jj@gmail.com>
Signed-off-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 988f4a3b

drivers/staging/comedi/drivers/ni_mio_common.c

+2 −0
Original line number Diff line number Diff line
@@ -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);

}