From patchwork Thu Aug 18 20:33:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Dufresne X-Patchwork-Id: 12947855 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 3232DC28B2B for ; Thu, 18 Aug 2022 20:33:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344677AbiHRUd4 (ORCPT ); Thu, 18 Aug 2022 16:33:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52626 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238275AbiHRUdy (ORCPT ); Thu, 18 Aug 2022 16:33:54 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12EE633A0E; Thu, 18 Aug 2022 13:33:51 -0700 (PDT) Received: from whitebuilder.lan (192-222-136-102.qc.cable.ebox.net [192.222.136.102]) (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: nicolas) by madras.collabora.co.uk (Postfix) with ESMTPSA id 026F96601B46; Thu, 18 Aug 2022 21:33:47 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1660854830; bh=pggMW/0Bxy8VjFzlvpemyaipfIDNrL2BmOAkso3LhhQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V2yfagMG57Nh3EXsVf9/Smr/3esiSEbIWwaYOIiLAHA+6nV2niIE9P/2HYaJiywov G8QzDCDnzOeAeslg/Tnf6Y9Fa3il7jyPDhLjVbM7IVs/H25Cncmgrkt9lNIanNMXIH osCQAXJsYJM/LZFnYttXjTZGnrlrEAZGby67oDBvlz6EPuX9kn5AGAraiJ8vISeafA KZV1o2iv9NY/0c63k5T/OFe3i3YohHc1x0KoPwBvSjXyfhTNG0GaSs3gFmR3bVKV1j rwpyCFPLSBmjLyK3NVkNNEQlz6x/P9B6B1wKrascvZhZh9JV39AGv6CnYK47ccsQ/a wNOz5rtW8yh6Q== From: Nicolas Dufresne To: linux-media@vger.kernel.org, Maxime Ripard , Paul Kocialkowski , Mauro Carvalho Chehab , Greg Kroah-Hartman , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Ezequiel Garcia , Hans Verkuil Cc: kernel@collabora.com, Nicolas Dufresne , stable@vger.kernel.org, linux-staging@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v1 1/3] media: cedrus: Fix watchdog race condition Date: Thu, 18 Aug 2022 16:33:06 -0400 Message-Id: <20220818203308.439043-2-nicolas.dufresne@collabora.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220818203308.439043-1-nicolas.dufresne@collabora.com> References: <20220818203308.439043-1-nicolas.dufresne@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The watchdog needs to be schedule before we trigger the decode operation, otherwise there is a risk that the decoder IRQ will be called before we have schedule the watchdog. As a side effect, the watchdog would never be cancelled and its function would be called at an inappropriate time. This was observed while running Fluster with GStreamer as a backend. Some programming error would cause the decoder IRQ to be call very quickly after the trigger. Later calls into the driver would deadlock due to the unbalanced state. Cc: stable@vger.kernel.org Fixes: 7c38a551bda1 ("media: cedrus: Add watchdog for job completion") Signed-off-by: Nicolas Dufresne Reviewed-by: Paul Kocialkowski Reviewed-by: Jernej Skrabec --- drivers/staging/media/sunxi/cedrus/cedrus_dec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c index 3b6aa78a2985f..e7f7602a5ab40 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c @@ -106,11 +106,11 @@ void cedrus_device_run(void *priv) /* Trigger decoding if setup went well, bail out otherwise. */ if (!error) { - dev->dec_ops[ctx->current_codec]->trigger(ctx); - /* Start the watchdog timer. */ schedule_delayed_work(&dev->watchdog_work, msecs_to_jiffies(2000)); + + dev->dec_ops[ctx->current_codec]->trigger(ctx); } else { v4l2_m2m_buf_done_and_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx, From patchwork Thu Aug 18 20:33:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Dufresne X-Patchwork-Id: 12947856 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 83F2FC25B0E for ; Thu, 18 Aug 2022 20:34:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346096AbiHRUd7 (ORCPT ); Thu, 18 Aug 2022 16:33:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346091AbiHRUd6 (ORCPT ); Thu, 18 Aug 2022 16:33:58 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9F3F3C8F9; Thu, 18 Aug 2022 13:33:56 -0700 (PDT) Received: from whitebuilder.lan (192-222-136-102.qc.cable.ebox.net [192.222.136.102]) (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: nicolas) by madras.collabora.co.uk (Postfix) with ESMTPSA id 9106A6601B7A; Thu, 18 Aug 2022 21:33:53 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1660854835; bh=hvEiAvpDFVVSoBAQ52gtXwVxHayJqh7AhxJnyUuWZII=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Yo6EbmMswKJNtgeL+rG3yxayMi3H8ZSeZRYASO4kAqFDuxN3l3Ka30qQpubYUGgwc 6bAbT8UosuDfp30uy4kGhil39cvLZTnCkhfmVPqoCVfshyhIlmcvunEeU7yrTXaWrk SUo1ns8Fz/YomVGR3o501y17WiWZBSot5PRmVP2tUZn2Wn+wqwccGOHGHf17+PBQjd gFw10zuG5qGqZOfA+S6Ltn9LkPlamcg63+EATVJ4Ee4a4pJhGWsElLHTlenrSFlnnW JaKDEqlydcRNE0hQe3E5+RDkpQN8+K6oJW3bpFKgzmS1tRklppRZpl8ADQYoAVjUav yQ+jsc1Vk2f7Q== From: Nicolas Dufresne To: linux-media@vger.kernel.org, Maxime Ripard , Paul Kocialkowski , Mauro Carvalho Chehab , Greg Kroah-Hartman , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: kernel@collabora.com, Dmitry Osipenko , stable@vger.kernel.org, Nicolas Dufresne , linux-staging@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v1 2/3] media: cedrus: Set the platform driver data earlier Date: Thu, 18 Aug 2022 16:33:07 -0400 Message-Id: <20220818203308.439043-3-nicolas.dufresne@collabora.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220818203308.439043-1-nicolas.dufresne@collabora.com> References: <20220818203308.439043-1-nicolas.dufresne@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Dmitry Osipenko The cedrus_hw_resume() crashes with NULL deference on driver probe if runtime PM is disabled because it uses platform data that hasn't been set up yet. Fix this by setting the platform data earlier during probe. Cc: stable@vger.kernel.org Signed-off-by: Dmitry Osipenko Signed-off-by: Nicolas Dufresne Reviewed-by: Samuel Holland Acked-by: Paul Kocialkowski Acked-by: Jernej Skrabec --- drivers/staging/media/sunxi/cedrus/cedrus.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c index 960a0130cd620..55c54dfdc585c 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c @@ -448,6 +448,8 @@ static int cedrus_probe(struct platform_device *pdev) if (!dev) return -ENOMEM; + platform_set_drvdata(pdev, dev); + dev->vfd = cedrus_video_device; dev->dev = &pdev->dev; dev->pdev = pdev; @@ -521,8 +523,6 @@ static int cedrus_probe(struct platform_device *pdev) goto err_m2m_mc; } - platform_set_drvdata(pdev, dev); - return 0; err_m2m_mc: From patchwork Thu Aug 18 20:33:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Dufresne X-Patchwork-Id: 12947857 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 EC1FCC28B2B for ; Thu, 18 Aug 2022 20:34:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346104AbiHRUeE (ORCPT ); Thu, 18 Aug 2022 16:34:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346103AbiHRUeC (ORCPT ); Thu, 18 Aug 2022 16:34:02 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8FA1F3F1E2; Thu, 18 Aug 2022 13:34:00 -0700 (PDT) Received: from whitebuilder.lan (192-222-136-102.qc.cable.ebox.net [192.222.136.102]) (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: nicolas) by madras.collabora.co.uk (Postfix) with ESMTPSA id 606AE6601BCA; Thu, 18 Aug 2022 21:33:57 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1660854839; bh=GgPaajQKLXv1616Hqx0PaERx4rlMxlMQza9pzPITvMk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JYDZhzavP0trr+jEEMho+vU+B85/kDtbonYhDioXoPlFOh/TXFSNbC08MUU+JTXQc HSaIkIYCz6PG8Ab++c23BV+/fPUBLzM8FSyaxqBHSVBJRnvf/+QDfW3Y5zQza7TlvO +3HPLFDWffWf5GTbgqED4lOZEfVTuSgVHUcVoVHBBlcYIqeR2jq/ky7b8W1X6SrFnY oz6Fc087flGK0HZ0J2xWb1KjOd1N5XaR1mnAY4y9jFq+N7ylsDPIriVrZV4eCwwmtq Dx71wDW//MViP5NhPmjnZ2qCcPrifKhCxa9vmOBcDSY+5X7FnLP5KGosaC+0r02iMC qEeno4yLzr6Cg== From: Nicolas Dufresne To: linux-media@vger.kernel.org, Maxime Ripard , Paul Kocialkowski , Mauro Carvalho Chehab , Greg Kroah-Hartman , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: kernel@collabora.com, Dmitry Osipenko , stable@vger.kernel.org, Nicolas Dufresne , linux-staging@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v1 3/3] media: cedrus: Fix endless loop in cedrus_h265_skip_bits() Date: Thu, 18 Aug 2022 16:33:08 -0400 Message-Id: <20220818203308.439043-4-nicolas.dufresne@collabora.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220818203308.439043-1-nicolas.dufresne@collabora.com> References: <20220818203308.439043-1-nicolas.dufresne@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Dmitry Osipenko The busy status bit may never de-assert if number of programmed skip bits is incorrect, resulting in a kernel hang because the bit is polled endlessly in the code. Fix it by adding timeout for the bit-polling. This problem is reproducible by setting the data_bit_offset field of the HEVC slice params to a wrong value by userspace. Cc: stable@vger.kernel.org Reported-by: Nicolas Dufresne Signed-off-by: Dmitry Osipenko Signed-off-by: Nicolas Dufresne --- drivers/staging/media/sunxi/cedrus/cedrus_h265.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c index f703c585d91c5..f0bc118021b0a 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c @@ -227,6 +227,7 @@ static void cedrus_h265_pred_weight_write(struct cedrus_dev *dev, static void cedrus_h265_skip_bits(struct cedrus_dev *dev, int num) { int count = 0; + u32 reg; while (count < num) { int tmp = min(num - count, 32); @@ -234,8 +235,9 @@ static void cedrus_h265_skip_bits(struct cedrus_dev *dev, int num) cedrus_write(dev, VE_DEC_H265_TRIGGER, VE_DEC_H265_TRIGGER_FLUSH_BITS | VE_DEC_H265_TRIGGER_TYPE_N_BITS(tmp)); - while (cedrus_read(dev, VE_DEC_H265_STATUS) & VE_DEC_H265_STATUS_VLD_BUSY) - udelay(1); + + if (cedrus_wait_for(dev, VE_DEC_H265_STATUS, VE_DEC_H265_STATUS_VLD_BUSY)) + dev_err_ratelimited(dev->dev, "timed out waiting to skip bits\n"); count += tmp; }