| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 085/102] staging: comedi: ni_mio_common: ack ai fifo error interrupts. | Date | Fri, 6 Apr 2018 15:24:06 +0200 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: Frank Mori Hess <fmh6jj@gmail.com>
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@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>
--- 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); }
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