From patchwork Tue Mar 5 13:26:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 10839453 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B0FF01669 for ; Tue, 5 Mar 2019 13:29:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9EFB22B686 for ; Tue, 5 Mar 2019 13:29:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 926572B697; Tue, 5 Mar 2019 13:29:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1D8E02B686 for ; Tue, 5 Mar 2019 13:29:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727807AbfCEN3w (ORCPT ); Tue, 5 Mar 2019 08:29:52 -0500 Received: from mout.kundenserver.de ([212.227.17.10]:41229 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727670AbfCEN3w (ORCPT ); Tue, 5 Mar 2019 08:29:52 -0500 Received: from wuerfel.lan ([109.192.41.194]) by mrelayeu.kundenserver.de (mreue106 [212.227.15.145]) with ESMTPA (Nemesis) id 1MpUlO-1hJwTb07J6-00prAc; Tue, 05 Mar 2019 14:29:27 +0100 From: Arnd Bergmann To: Sakari Ailus , Mauro Carvalho Chehab , Greg Kroah-Hartman Cc: Arnd Bergmann , Yong Zhi , Tian Shu Qiu , Bingbu Cao , linux-media@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH] [v2] media: staging/intel-ipu3: reduce kernel stack usage Date: Tue, 5 Mar 2019 14:26:29 +0100 Message-Id: <20190305132924.3889416-1-arnd@arndb.de> X-Mailer: git-send-email 2.20.0 MIME-Version: 1.0 X-Provags-ID: V03:K1:Lg/SskIDeHvGAyJNfeHro9IMUKhzdZuNTkJW4Kzls0ly1gshGfo BbuOZomN20K8hFMf3BKAY3ygAE2QD8iVW18O8eJJUOk/enUWdnFbQNK/Yra26UPJQMczD0Y 4UKw1YfrO/LBwE/QIbtTFDOsh1NZ5aOe+bAL/vk5WvfDTpjijbdOXxRxh4qiwWbllcqBby5 Uc9XPSI8+rAum6g3SLfKw== X-UI-Out-Filterresults: notjunk:1;V03:K0:DrYNpH9E0Uk=:NVd1Yx8oK8bpALYp0HkTfm YpdO1mavC3d3YiC6CX8nkDtjc4JkWXBEp+1Yr7+fibnNPHRp9nxiAQfC8NYzQ0tYuYE7ihsw9 qZh1YCRTXOxTq8eTkNzSmtWDyn3hJO5JGNYNc0PXKMxd9oecGICv1g4Plk8+JSTVG79MrsR2T t3zp33pxMH1xCLiG3inNhG1um2e6FfJO+42lvw1ccyAbmPcyglJykRiEohsl8mjXnbyZB+Jub Psk7UyRBXmvjISuTRI94gCQPFn8m6KvemnyDbbFhB63p7C+DJY6mhMVZicb+Sx2QsAqnQnyR+ 1GxPLlpQmT60t59lFi5FawdAHZBn20Z63to9oNIc6gR447c5sqS12vlN4WmBPRbzI9o4iV46L 5XNADgz4Zb3TzgOb0CCdwTRpkrJQxoxOFMdWaejAVkXsBkMVz6AEYtD74wfkHHVej5v8/LZcB LOOyrTMk5HNbyIQqaHF0awLBDej5PDcLwYPtbRwnvnxvZf7mgGxV4JEyp5yIGdS9mcRCWOOUB BgE5hbf6G3gkdYLA+EweNM4ofDw9NsP3f4VOdjWX6wjyXpn3eVxTk+lSkFYq3pnC+4AOn1S9B ia9w9DLenwi0PP9JZV5aq0hy3UN5SIdNsQrVlc4lTaFv8Ur7GKpmpPHZhHhbpW+r3lrTKcAh6 Kix3bRsM/Oeibm56TXOT/BfAdLkxMmNT1zsm65JvzUHhcFzgdsiwYkKEhG/ScRlkWNoGH8p7T AAmWF6qwn8fbnYJTu6YCULJDDsJPzKO7tlD24Q== Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The imgu_css_queue structure is too large to be put on the kernel stack, as we can see in 32-bit builds: drivers/staging/media/ipu3/ipu3-css.c: In function 'imgu_css_fmt_try': drivers/staging/media/ipu3/ipu3-css.c:1863:1: error: the frame size of 1172 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] By dynamically allocating this array, the stack usage goes down to an acceptable 140 bytes for the same x86-32 configuration. Fixes: f5f2e4273518 ("media: staging/intel-ipu3: Add css pipeline programming") Signed-off-by: Arnd Bergmann --- v2: restructure to use 'return -ENOMEM' instead of goto for failed allocation. --- drivers/staging/media/ipu3/ipu3-css.c | 35 ++++++++++++++++++--------- 1 file changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/staging/media/ipu3/ipu3-css.c b/drivers/staging/media/ipu3/ipu3-css.c index 15ab77e4b766..e7f1898874fd 100644 --- a/drivers/staging/media/ipu3/ipu3-css.c +++ b/drivers/staging/media/ipu3/ipu3-css.c @@ -3,6 +3,7 @@ #include #include +#include #include "ipu3-css.h" #include "ipu3-css-fw.h" @@ -1744,15 +1745,18 @@ int imgu_css_fmt_try(struct imgu_css *css, struct v4l2_rect *const bds = &r[IPU3_CSS_RECT_BDS]; struct v4l2_rect *const env = &r[IPU3_CSS_RECT_ENVELOPE]; struct v4l2_rect *const gdc = &r[IPU3_CSS_RECT_GDC]; - struct imgu_css_queue q[IPU3_CSS_QUEUES]; - struct v4l2_pix_format_mplane *const in = - &q[IPU3_CSS_QUEUE_IN].fmt.mpix; - struct v4l2_pix_format_mplane *const out = - &q[IPU3_CSS_QUEUE_OUT].fmt.mpix; - struct v4l2_pix_format_mplane *const vf = - &q[IPU3_CSS_QUEUE_VF].fmt.mpix; + struct imgu_css_queue *q; + struct v4l2_pix_format_mplane *in, *out, *vf; int i, s, ret; + q = kcalloc(IPU3_CSS_QUEUES, sizeof(struct imgu_css_queue), GFP_KERNEL); + if (!q) + return -ENOMEM; + + in = &q[IPU3_CSS_QUEUE_IN].fmt.mpix; + out = &q[IPU3_CSS_QUEUE_OUT].fmt.mpix; + vf = &q[IPU3_CSS_QUEUE_VF].fmt.mpix; + /* Adjust all formats, get statistics buffer sizes and formats */ for (i = 0; i < IPU3_CSS_QUEUES; i++) { if (fmts[i]) @@ -1766,7 +1770,8 @@ int imgu_css_fmt_try(struct imgu_css *css, IPU3_CSS_QUEUE_TO_FLAGS(i))) { dev_notice(css->dev, "can not initialize queue %s\n", qnames[i]); - return -EINVAL; + ret = -EINVAL; + goto out; } } for (i = 0; i < IPU3_CSS_RECTS; i++) { @@ -1788,7 +1793,8 @@ int imgu_css_fmt_try(struct imgu_css *css, if (!imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_IN]) || !imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_OUT])) { dev_warn(css->dev, "required queues are disabled\n"); - return -EINVAL; + ret = -EINVAL; + goto out; } if (!imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_OUT])) { @@ -1829,7 +1835,8 @@ int imgu_css_fmt_try(struct imgu_css *css, ret = imgu_css_find_binary(css, pipe, q, r); if (ret < 0) { dev_err(css->dev, "failed to find suitable binary\n"); - return -EINVAL; + ret = -EINVAL; + goto out; } css->pipes[pipe].bindex = ret; @@ -1843,7 +1850,8 @@ int imgu_css_fmt_try(struct imgu_css *css, IPU3_CSS_QUEUE_TO_FLAGS(i))) { dev_err(css->dev, "final resolution adjustment failed\n"); - return -EINVAL; + ret = -EINVAL; + goto out; } *fmts[i] = q[i].fmt.mpix; } @@ -1859,7 +1867,10 @@ int imgu_css_fmt_try(struct imgu_css *css, bds->width, bds->height, gdc->width, gdc->height, out->width, out->height, vf->width, vf->height); - return 0; + ret = 0; +out: + kfree(q); + return ret; } int imgu_css_fmt_set(struct imgu_css *css,