From patchwork Thu Jun 25 17:42:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dafna Hirschfeld X-Patchwork-Id: 209297 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=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 BE3ADC433E0 for ; Thu, 25 Jun 2020 17:43:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B8B4207E8 for ; Thu, 25 Jun 2020 17:43:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406868AbgFYRnJ (ORCPT ); Thu, 25 Jun 2020 13:43:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48768 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406865AbgFYRnI (ORCPT ); Thu, 25 Jun 2020 13:43:08 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6D96C08C5DB for ; Thu, 25 Jun 2020 10:43:07 -0700 (PDT) Received: from localhost.localdomain (p200300cb8737cf00e4140a231ed1025d.dip0.t-ipconnect.de [IPv6:2003:cb:8737:cf00:e414:a23:1ed1:25d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: dafna) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 049272A5765; Thu, 25 Jun 2020 18:43:05 +0100 (BST) From: Dafna Hirschfeld To: linux-media@vger.kernel.org, laurent.pinchart@ideasonboard.com Cc: dafna.hirschfeld@collabora.com, helen.koike@collabora.com, ezequiel@collabora.com, hverkuil@xs4all.nl, kernel@collabora.com, dafna3@gmail.com, sakari.ailus@linux.intel.com, linux-rockchip@lists.infradead.org, mchehab@kernel.org, tfiga@chromium.org Subject: [PATCH 2/3] media: staging: rkisp1: params: don't release lock in isr before buffer is done Date: Thu, 25 Jun 2020 19:42:56 +0200 Message-Id: <20200625174257.22216-3-dafna.hirschfeld@collabora.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200625174257.22216-1-dafna.hirschfeld@collabora.com> References: <20200625174257.22216-1-dafna.hirschfeld@collabora.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org In the irq handler 'rkisp1_params_isr', the lock 'config_lock' should be held as long as the current buffer is used. Otherwise the stop_streaming calback might remove it from the list and pass it to userspace while it is referenced in the irq handler. Signed-off-by: Dafna Hirschfeld --- drivers/staging/media/rkisp1/rkisp1-params.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/staging/media/rkisp1/rkisp1-params.c b/drivers/staging/media/rkisp1/rkisp1-params.c index 762c2259b807..bf006dbeee2d 100644 --- a/drivers/staging/media/rkisp1/rkisp1-params.c +++ b/drivers/staging/media/rkisp1/rkisp1-params.c @@ -1210,10 +1210,11 @@ void rkisp1_params_isr(struct rkisp1_device *rkisp1, u32 isp_mis) if (!list_empty(¶ms->params)) cur_buf = list_first_entry(¶ms->params, struct rkisp1_buffer, queue); - spin_unlock(¶ms->config_lock); - if (!cur_buf) + if (!cur_buf) { + spin_unlock(¶ms->config_lock); return; + } new_params = (struct rkisp1_params_cfg *)(cur_buf->vaddr[0]); @@ -1228,13 +1229,11 @@ void rkisp1_params_isr(struct rkisp1_device *rkisp1, u32 isp_mis) isp_ctrl |= RKISP1_CIF_ISP_CTRL_ISP_CFG_UPD; rkisp1_write(params->rkisp1, isp_ctrl, RKISP1_CIF_ISP_CTRL); - spin_lock(¶ms->config_lock); list_del(&cur_buf->queue); - spin_unlock(¶ms->config_lock); - cur_buf->vb.sequence = frame_sequence; vb2_buffer_done(&cur_buf->vb.vb2_buf, VB2_BUF_STATE_DONE); } + spin_unlock(¶ms->config_lock); } static const struct rkisp1_cif_isp_awb_meas_config rkisp1_awb_params_default_config = {