From patchwork Thu Nov 10 20:13:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13039288 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2411C43219 for ; Thu, 10 Nov 2022 20:14:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231486AbiKJUOz (ORCPT ); Thu, 10 Nov 2022 15:14:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231298AbiKJUOx (ORCPT ); Thu, 10 Nov 2022 15:14:53 -0500 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90B644D5E6; Thu, 10 Nov 2022 12:14:52 -0800 (PST) Received: from dimapc.. (unknown [109.252.117.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dmitry.osipenko) by madras.collabora.co.uk (Postfix) with ESMTPSA id 32EF16602A35; Thu, 10 Nov 2022 20:14:49 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1668111291; bh=8lPPkB/X/nAF7UCnlj4YAfVJ4CiTG60x/dmXzJUkhFQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Vs2DxqerXBoYuKVokuo4qllebuVOqRgJgOpEfACXfRig5MufY62WKEHWvF/TUVx5J cLnzg7+wdeX5IipFW0IcfkQN1byMmwbt/0wlM/oGvFJEMvmAHO0WeOnQJltTIjkON9 OT56X85voHyfhssNDFiy7CAvhnjlcF+LZ0YBuOQedrYMIix/hsfgyRYJ2FaHYo2NhF eD9Qz6L32qGZXVhlY3HuwfdxozObHRKC0FCIAbvyLZVmNXmqBJ5svUDWy5tgC8fHq8 OY6cY1et+6vAWLYfCRoEJ0vs5iiKlfkc9eCn+24UrhclhzmzECbfJJlC/lvPZkrEvd GOgUuvv+yCMjg== From: Dmitry Osipenko To: Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Benjamin Gaignard , Liam Mark , Brian Starkey , John Stultz , Gerd Hoffmann , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Thomas Zimmermann , Tomi Valkeinen , Thierry Reding , Tomasz Figa , Marek Szyprowski , Mauro Carvalho Chehab , Srinivas Kandagatla , Amol Maheshwari Cc: linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-arm-msm@vger.kernel.org, kernel@collabora.com Subject: [PATCH v1 1/6] dma-buf: Move dma_buf_mmap_internal() to dynamic locking specification Date: Thu, 10 Nov 2022 23:13:44 +0300 Message-Id: <20221110201349.351294-2-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221110201349.351294-1-dmitry.osipenko@collabora.com> References: <20221110201349.351294-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org All dma-buf functions has been moved to dynamic locking specification The dma_buf_mmap_internal() was missed out by accident. Take reservation lock around file mapping operation to adhere the common locking convention. Reported-by: Daniel Vetter Signed-off-by: Dmitry Osipenko Reviewed-by: Christian König for this patch here. Acked-by: Christian König for the rest of the --- drivers/dma-buf/dma-buf.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 13bfd2d09c56..b809513b03fe 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -129,6 +129,7 @@ static struct file_system_type dma_buf_fs_type = { static int dma_buf_mmap_internal(struct file *file, struct vm_area_struct *vma) { struct dma_buf *dmabuf; + int ret; if (!is_dma_buf_file(file)) return -EINVAL; @@ -144,7 +145,11 @@ static int dma_buf_mmap_internal(struct file *file, struct vm_area_struct *vma) dmabuf->size >> PAGE_SHIFT) return -EINVAL; - return dmabuf->ops->mmap(dmabuf, vma); + dma_resv_lock(dmabuf->resv, NULL); + ret = dmabuf->ops->mmap(dmabuf, vma); + dma_resv_unlock(dmabuf->resv); + + return ret; } static loff_t dma_buf_llseek(struct file *file, loff_t offset, int whence)