From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:60632 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751636AbdJIMfo (ORCPT ); Mon, 9 Oct 2017 08:35:44 -0400 Subject: Patch "staging: iio: ad7192: Fix - use the dedicated reset function avoiding dma from stack." has been added to the 4.9-stable tree To: stefan.popa@analog.com, Jonathan.Cameron@huawei.com, gregkh@linuxfoundation.org, lars@metafoo.de, michael.hennerich@analog.com Cc: , From: Date: Mon, 09 Oct 2017 14:35:40 +0200 Message-ID: <150755254038216@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled staging: iio: ad7192: Fix - use the dedicated reset function avoiding dma from stack. to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: staging-iio-ad7192-fix-use-the-dedicated-reset-function-avoiding-dma-from-stack.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From f790923f146140a261ad211e5baf75d169f16fb2 Mon Sep 17 00:00:00 2001 From: Stefan Popa Date: Thu, 14 Sep 2017 16:50:28 +0300 Subject: staging: iio: ad7192: Fix - use the dedicated reset function avoiding dma from stack. From: Stefan Popa commit f790923f146140a261ad211e5baf75d169f16fb2 upstream. Depends on: 691c4b95d1 ("iio: ad_sigma_delta: Implement a dedicated reset function") SPI host drivers can use DMA to transfer data, so the buffer should be properly allocated. Keeping it on the stack could cause an undefined behavior. The dedicated reset function solves this issue. Signed-off-by: Stefan Popa Acked-by: Lars-Peter Clausen Acked-by: Michael Hennerich Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/adc/ad7192.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- a/drivers/staging/iio/adc/ad7192.c +++ b/drivers/staging/iio/adc/ad7192.c @@ -222,11 +222,9 @@ static int ad7192_setup(struct ad7192_st struct iio_dev *indio_dev = spi_get_drvdata(st->sd.spi); unsigned long long scale_uv; int i, ret, id; - u8 ones[6]; /* reset the serial interface */ - memset(&ones, 0xFF, 6); - ret = spi_write(st->sd.spi, &ones, 6); + ret = ad_sd_reset(&st->sd, 48); if (ret < 0) goto out; usleep_range(500, 1000); /* Wait for at least 500us */ Patches currently in stable-queue which might be from stefan.popa@analog.com are queue-4.9/staging-iio-ad7192-fix-use-the-dedicated-reset-function-avoiding-dma-from-stack.patch