From patchwork Tue Dec 13 14:35:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 633819 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 83926C4332F for ; Tue, 13 Dec 2022 14:36:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235903AbiLMOgO (ORCPT ); Tue, 13 Dec 2022 09:36:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235686AbiLMOgI (ORCPT ); Tue, 13 Dec 2022 09:36:08 -0500 Received: from mail-ej1-x62d.google.com (mail-ej1-x62d.google.com [IPv6:2a00:1450:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7394420BFD for ; Tue, 13 Dec 2022 06:36:05 -0800 (PST) Received: by mail-ej1-x62d.google.com with SMTP id tz12so14308379ejc.9 for ; Tue, 13 Dec 2022 06:36:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=LoBGLUjEyhQfXWIWPOu9C92qTSNRy93bFCVJA1Gy7YQ=; b=A9+F+Qfs1V94/OeuF0azEIfhIkJi+LCS+d3Cs11+Nwe+721/Z9kPMq2qwYD6CWLhp7 xjy4l9MDJSxb5AwXA6oXMgl0/A8whNjolgrz2x9VQtDgLXTsT8oDiDcUz6Ca9mq1MNb4 P12dtwtMiMZQBdZz0Ow2u4D0VNu0bWqYtRQcw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=LoBGLUjEyhQfXWIWPOu9C92qTSNRy93bFCVJA1Gy7YQ=; b=mBizwh5i+kfP1D6nRPSMN3UETg4V1N+yREmh5//b0JhBMmrPlq0tcxJSpbZubSNJ+q w/cwKWXN/547pp6KopwaiHNUNY8jTNoxJPOGz3RoVA04nukeAmeXeHi7aWxQLCJ0PA8e jybCe9ULXTTERxJWWSzC2XzQ2NBjN7rDgT6paNKQAc0oTQpEtFhkdV2g9eWc2YmTZDJT uYyDkQhsIMOIMOQXXq3KlcPgVR8eFFS6ucsO8GUIGyR0uVrzwtMAyNETB32hVVW6Q08o 8QZy/emidGQQOJnwPDIs1ZHsI/CVMLPqYVSSe7AanI2K8GTE/pwHHbSagTVl9FOgwmaS /1Nw== X-Gm-Message-State: ANoB5pnr6sT/WHxavSGzw+0BftuV48Y9wfCK2E/Z9DUwev7SleoiviVn EPBfxyxblJgwW41zIX+rU9NXCfJLcwsKwxWHjLo= X-Google-Smtp-Source: AA0mqf6RdH1mZDqyzcy4filvbzKOY19S4yxBwVauYac4/dNFu+WtMWhDlHsBJg4Rb277UyI22owjEA== X-Received: by 2002:a17:906:a410:b0:7c0:e5ca:411c with SMTP id l16-20020a170906a41000b007c0e5ca411cmr15851856ejz.17.1670942163897; Tue, 13 Dec 2022 06:36:03 -0800 (PST) Received: from alco.roam.corp.google.com ([100.104.168.209]) by smtp.gmail.com with ESMTPSA id kv17-20020a17090778d100b00781dbdb292asm4613960ejc.155.2022.12.13.06.36.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Dec 2022 06:36:03 -0800 (PST) From: Ricardo Ribalda Date: Tue, 13 Dec 2022 15:35:31 +0100 Subject: [PATCH v2 2/2] media: uvcvideo: Do not alloc dev->status MIME-Version: 1.0 Message-Id: <20221212-uvc-race-v2-2-54496cc3b8ab@chromium.org> References: <20221212-uvc-race-v2-0-54496cc3b8ab@chromium.org> In-Reply-To: <20221212-uvc-race-v2-0-54496cc3b8ab@chromium.org> To: Max Staudt , Sergey Senozhatsky , Yunke Cao , Laurent Pinchart , Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org, stable@vger.kernel.org, linux-kernel@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=1689; i=ribalda@chromium.org; h=from:subject:message-id; bh=jEDQuOW3z7ZGcsKin4RTBJvSelqdlHZ1geiYjpdBLTo=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjmI3O4ptcgGHWc6J12tWDekLKnqXOo3j3z7Rmykia fM6ORvGJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY5iNzgAKCRDRN9E+zzrEiFvcEA CRu/tDiApvFvJAFb1Ou/ogsX4eEXmPAA4FtTn3zf36wW/CYBD3IefrmVoFpPkS1vS50bXAbNZO4gEG YBw2ZUKrDBFcwgKx01rQD9CDjIZBWR+yyP7SnKw8TMMcIsvK6nkgUdwotVDWvJC/gBWr3qCdrwo38l LtHT+kfE1PBU027stWfi3t0SzBk620H27apN5mmbcrXN5SKx/g61r/9dwZGRWGJqAAFtJi5ETOmwfD xKePSptFpzgeVQxpGskAZYlD+KyoYzzlcOQMQ+CiCVRckf1GD+iZdpo2wuWSE3E0W/nTsq3Sl0Sj5t c7Ny3sOMd1vkTfGhxl7ftL5y85B14Ilp17tqbpD5s9SqCRcNCyu6Al5Zn2+AKpuXtiZFu5KkLjBCVJ e95B6qrk35kQyrEb73wS9iChL/KNYgrdoVyITF+j5OHxruVFeYa2Wi4H2evV245EDo07y/qL7O3++1 OpC3WHZ0mYJk/rFS8eWfUTMqiBzfha7iTCx3u7r5AZXr/DZ8ngyDkBehsMNY4w51rZ7e05kVp87cKJ EJvUimG4v+ZCaFVF2RrNCsDZtoFbDPD8Q+OnK4TYyDtmipeGdtF0hmUXi6a5xDLxvXaCRDG0/fN/8Q mwxYI/uW9XzF1H5HGCc4EhYdkQf6FgPzX6vtW5Jc7cUCY/QH98gAAektEAFA== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org UVC_MAX_STATUS_SIZE is 16, simplify the code by inlining dev->status. Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_status.c | 9 +-------- drivers/media/usb/uvc/uvcvideo.h | 2 +- 2 files changed, 2 insertions(+), 9 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c index 09a5802dc974..52999b3b7c48 100644 --- a/drivers/media/usb/uvc/uvc_status.c +++ b/drivers/media/usb/uvc/uvc_status.c @@ -259,15 +259,9 @@ int uvc_status_init(struct uvc_device *dev) uvc_input_init(dev); - dev->status = kzalloc(UVC_MAX_STATUS_SIZE, GFP_KERNEL); - if (dev->status == NULL) - return -ENOMEM; - dev->int_urb = usb_alloc_urb(0, GFP_KERNEL); - if (dev->int_urb == NULL) { - kfree(dev->status); + if (!dev->int_urb) return -ENOMEM; - } pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress); @@ -296,7 +290,6 @@ void uvc_status_unregister(struct uvc_device *dev) void uvc_status_cleanup(struct uvc_device *dev) { usb_free_urb(dev->int_urb); - kfree(dev->status); } int uvc_status_start(struct uvc_device *dev, gfp_t flags) diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 6a9b72d6789e..ccc7e3b60bf1 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -559,7 +559,7 @@ struct uvc_device { /* Status Interrupt Endpoint */ struct usb_host_endpoint *int_ep; struct urb *int_urb; - u8 *status; + u8 status[UVC_MAX_STATUS_SIZE]; bool flush_status; struct input_dev *input; char input_phys[64];