From patchwork Tue Nov 17 16:23:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Ardelean X-Patchwork-Id: 11912713 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 541ABC83010 for ; Tue, 17 Nov 2020 16:19:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1DF0924655 for ; Tue, 17 Nov 2020 16:19:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727777AbgKQQSy (ORCPT ); Tue, 17 Nov 2020 11:18:54 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:22312 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727762AbgKQQSy (ORCPT ); Tue, 17 Nov 2020 11:18:54 -0500 Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0AHFgjdb010907; Tue, 17 Nov 2020 11:18:41 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 34td199y7a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Nov 2020 11:18:35 -0500 Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 0AHGIY0F044678 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Tue, 17 Nov 2020 11:18:34 -0500 Received: from ASHBCASHYB4.ad.analog.com (10.64.17.132) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Tue, 17 Nov 2020 11:18:33 -0500 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBCASHYB4.ad.analog.com (10.64.17.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Tue, 17 Nov 2020 11:18:33 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Tue, 17 Nov 2020 11:18:33 -0500 Received: from localhost.localdomain ([10.48.65.12]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 0AHGIRTO032565; Tue, 17 Nov 2020 11:18:30 -0500 From: Alexandru Ardelean To: , CC: , , Alexandru Ardelean Subject: [RFC PATCH 02/12] iio: buffer: add back-ref from iio_buffer to iio_dev Date: Tue, 17 Nov 2020 18:23:30 +0200 Message-ID: <20201117162340.43924-3-alexandru.ardelean@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201117162340.43924-1-alexandru.ardelean@analog.com> References: <20201117162340.43924-1-alexandru.ardelean@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-17_04:2020-11-17,2020-11-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 suspectscore=0 impostorscore=0 mlxscore=0 malwarescore=0 adultscore=0 clxscore=1015 phishscore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011170115 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org An IIO device will have multiple buffers, but it shouldn't be allowed that an IIO buffer should belong to more than 1 IIO device. Once things get moved more from IIO device to the IIO buffer, and an IIO device will be able to have more than 1 buffer attached, there will be a need for a back-ref to the IIO device [from the IIO buffer]. This change adds that. Signed-off-by: Alexandru Ardelean --- drivers/iio/industrialio-buffer.c | 2 ++ include/linux/iio/buffer_impl.h | 3 +++ 2 files changed, 5 insertions(+) diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 9663dec3dcf3..08aa8e0782ce 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -1505,5 +1505,7 @@ void iio_device_attach_buffer(struct iio_dev *indio_dev, struct iio_buffer *buffer) { indio_dev->buffer = iio_buffer_get(buffer); + + indio_dev->buffer->indio_dev = indio_dev; } EXPORT_SYMBOL_GPL(iio_device_attach_buffer); diff --git a/include/linux/iio/buffer_impl.h b/include/linux/iio/buffer_impl.h index a63dc07b7350..67d73d465e02 100644 --- a/include/linux/iio/buffer_impl.h +++ b/include/linux/iio/buffer_impl.h @@ -69,6 +69,9 @@ struct iio_buffer_access_funcs { * those writing new buffer implementations. */ struct iio_buffer { + /** @indio_dev: IIO device to which this buffer belongs to. */ + struct iio_dev *indio_dev; + /** @length: Number of datums in buffer. */ unsigned int length;