Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753544AbdFLRQz (ORCPT ); Mon, 12 Jun 2017 13:16:55 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:40252 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753472AbdFLPaw (ORCPT ); Mon, 12 Jun 2017 11:30:52 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Matt Ranostay , Jonathan Cameron Subject: [PATCH 4.11 086/150] iio: proximity: as3935: fix iio_trigger_poll issue Date: Mon, 12 Jun 2017 17:24:53 +0200 Message-Id: <20170612152523.078935454@linuxfoundation.org> X-Mailer: git-send-email 2.13.1 In-Reply-To: <20170612152519.404936272@linuxfoundation.org> References: <20170612152519.404936272@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1393 Lines: 44 4.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matt Ranostay commit 9122b54f266ddee09654fe3fbc503c1a60f4a01c upstream. Using iio_trigger_poll() can oops when multiple interrupts happen before the first is handled. Use iio_trigger_poll_chained() instead and use the timestamp when processed, since it will be in theory be 2 ms max latency. Fixes: 24ddb0e4bba4 ("iio: Add AS3935 lightning sensor support") Signed-off-by: Matt Ranostay Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/proximity/as3935.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/iio/proximity/as3935.c +++ b/drivers/iio/proximity/as3935.c @@ -215,7 +215,7 @@ static irqreturn_t as3935_trigger_handle st->buffer[0] = val & AS3935_DATA_MASK; iio_push_to_buffers_with_timestamp(indio_dev, &st->buffer, - pf->timestamp); + iio_get_time_ns(indio_dev)); err_read: iio_trigger_notify_done(indio_dev->trig); @@ -244,7 +244,7 @@ static void as3935_event_work(struct wor switch (val) { case AS3935_EVENT_INT: - iio_trigger_poll(st->trig); + iio_trigger_poll_chained(st->trig); break; case AS3935_NOISE_INT: dev_warn(&st->spi->dev, "noise level is too high\n");