From patchwork Fri Dec 2 17:26:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 29042 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp982762wrr; Fri, 2 Dec 2022 09:27:55 -0800 (PST) X-Google-Smtp-Source: AA0mqf6AgsED4idI2D/kv2+igFt7tfgYmioRpT8WIKOdsyiTBfV8U7EfpGn0bwcnaB7pmAVMnlFi X-Received: by 2002:a17:90a:fb84:b0:219:19c1:1ae7 with SMTP id cp4-20020a17090afb8400b0021919c11ae7mr33872307pjb.13.1670002075392; Fri, 02 Dec 2022 09:27:55 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1670002075; cv=none; d=google.com; s=arc-20160816; b=a72/jrj2WGfjmaV3ZSWt/mVMXoZ+ZMd6mNQ5cFkVdFQ5xKmDVuNcDwqc6rxhCUcRrq djil4HQVbVjZ1GEe2NTNXalQu4n7U7roEn4x6t+JJq2/t/Hre+WjnisDa4fbW1v4lGSU hpbDGAQlGjb7dUr35j44zkRduewiOtFFkDYzdgPaGF5dQWIIKwuXDCRqjPhMkb+A0sqz GGR15u7Y8DeS1ybtK55l0zeUEIBfyZV3/CFVBCfxDtueyayPQMD+Jbq4A3EsIP99wKrP kAMWiU+z6o0jV2RYLv/YFowaKwLtw2xKbikzYJfbJh+l5AIVopGECBbXWAcL8g4LOsk/ mjyw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=lq2zjTXnyErzfGb6eioAgG+bVMMpqmPEavD9V5s7iuY=; b=Mco/frncO7ul5U8phGXo5LbAr1bM3PouQudlIHJjJdb4BqJ69xiXNPt0fFiYdvskBX mV4Fcs5EegE2AwO7yJG3C/1oQwWc3ifULXwPlfZN7ZMJIPtM1HEt78+X+pi6OyyRA08+ Gc/msHQg7+vbneymXc/Evlj+oF8q2AryxNwIhc4DDvC9g+gww/WsS3rp+ZW7rP/Dx+Aw 6Njs7d3ErTO3qVh+TYyrWEhxhEk4sDxkG6XhFZz20Ah0ip99HD7YH26wFHMCHM1f5SnQ DjaAkjdzk62H7w0PURB1sCGkP17bI4xTbEsEIXqZLrIQC86TYWlOgrwyrW0zrhGmNnnv yuRw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=a2I1v0OQ; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id iz17-20020a170902ef9100b0017f9db0233fsi1657721plb.448.2022.12.02.09.27.41; Fri, 02 Dec 2022 09:27:55 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=a2I1v0OQ; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233784AbiLBR03 (ORCPT + 99 others); Fri, 2 Dec 2022 12:26:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233811AbiLBR0P (ORCPT ); Fri, 2 Dec 2022 12:26:15 -0500 Received: from mail-ed1-x534.google.com (mail-ed1-x534.google.com [IPv6:2a00:1450:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3D94410043 for ; Fri, 2 Dec 2022 09:26:14 -0800 (PST) Received: by mail-ed1-x534.google.com with SMTP id e13so7308817edj.7 for ; Fri, 02 Dec 2022 09:26:14 -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=lq2zjTXnyErzfGb6eioAgG+bVMMpqmPEavD9V5s7iuY=; b=a2I1v0OQ7JfZCZJzDSiUL+bJuXNesC3RH91l+QWq7gVz633EKR9HF5x4+CVz4It4Gu ukmSwK2c22KNbI3k4NNqSi3AsjLto3msm4dTMwEVWbg85Bu8mCbmPAxCWj7kmbvJldBB 2bNFTpQ8DuNSV5/tdKxoSRRzzu+gYta+vBntU= 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=lq2zjTXnyErzfGb6eioAgG+bVMMpqmPEavD9V5s7iuY=; b=aSm68Hty4C/gcuzaYR39Y8KOwBGHeSX6aCwhA+cHfEre7N0QsOZuOAZypSbhR8kprx cMNhZ7W1nPRVYtf1ekaSCrpng70ycFQ7/lJyRS5kKqy7HZkWu7azQzflwh7BKpK5uxEm 3fUWm+3vRDDcokrT3zKZTH4M3th1pu5/dN2dgl8QIOp2IdkBWDMD+nZ9fdsga2ZZGMOW 7R3lhQWq5synwoahAf7SyLGohoGeOcOkUfp5az+q6yUYTVVYne5PawEj6HCZQYgtFkip 0tvfPCwzw1ezm2+kYFoG5w3QNWOajVqqnwjnVJ76u4bOk9IkamW204bxO4Wx5LqVP7+I rIAg== X-Gm-Message-State: ANoB5pmMTs/qU5PkhHuuiXz9CFFVNx71pMVmeQgjXMb9jAVDLnvnh3rW 057bewmaWNlGtVCR6KuHdzReYf/mIPtyM58G7y4= X-Received: by 2002:aa7:cd4d:0:b0:46a:832a:b851 with SMTP id v13-20020aa7cd4d000000b0046a832ab851mr37681466edw.127.1670001972771; Fri, 02 Dec 2022 09:26:12 -0800 (PST) Received: from alco.roam.corp.google.com (80.71.134.83.ipv4.parknet.dk. [80.71.134.83]) by smtp.gmail.com with ESMTPSA id p9-20020a17090653c900b00782e3cf7277sm3202546ejo.120.2022.12.02.09.26.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Dec 2022 09:26:12 -0800 (PST) From: Ricardo Ribalda Date: Fri, 02 Dec 2022 18:26:03 +0100 Subject: [PATCH RESEND v2 2/2] media: uvcvideo: Use standard names for menus MIME-Version: 1.0 Message-Id: <20220920-standard-menues-v2-2-323be5539c22@chromium.org> References: <20220920-standard-menues-v2-0-323be5539c22@chromium.org> In-Reply-To: <20220920-standard-menues-v2-0-323be5539c22@chromium.org> To: Mauro Carvalho Chehab Cc: Ricardo Ribalda , Laurent Pinchart , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=13025; i=ribalda@chromium.org; h=from:subject:message-id; bh=/HUc3oWYKl0Ub8xD3uJ3KNHJSCezB3tSk9eoyRZgKBA=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjijUxvobhAIflNtJl514yjLkhL1GosKeGXZh8lUCM NRXFxeOJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY4o1MQAKCRDRN9E+zzrEiPIqD/ wOH8O5tJzH3ut5Fvnmdwl47hJlKzGyDLiWH/euG+J1gEiKVhavKO4A+USQpR72RGhwy6HmTFp0Qu9Z SIv7XDyZgpIX+sj54hxDUjZYfIhkfrDKxX0wQ2HhLuB3ytlmwwBWXFQMOvd5w8ipHV3YLz6zvWS1q4 MDRdQ6t7qUuJjOet4kP0j+GJK0HGhWhpPtA2xlPUog6OIWsIMD/AxDCyFokPURI1Q/pFMGLsdGwFd7 uLMgxnjhETX0YqyHNFwwOnH3dqukJuKMCzZ0aVhrlvqYXCiBr2BwQPHEJYGstxrmbCa5Pd8A2cp4mJ OJwWCNs7NuE239ogTAWLx/ELSpxrfjVS85muoJQoJnadK+RpBp2q7KH7P04ZQeI0Km7kQYIP2+8JQG TGTN5qyQcfQYuzijr3PnA+U/gV2L30BcMEQShektcW4PxbnnYJSscHlqpZPjJmewFwq7df4yVUG5aZ VFd6d6V1Bai4ERsLIzkIR835ge+cccIo+8yRy6IsCin08hXPorGP7bepNVWyEzzhmi+U1wZou1Ncip n3f3HvSOTs3GrLn5XIwcZ9hy5q6kLh8oKiEVpjdgTbaEMM0kmob4/xaIjqS4UoXPvHQ5LcG4BlFdI9 VYT8isxKpzB5e7iEZZRRN4yAI77DwZdLwA76m3s+sZw/tc8wOZMEdJjdlK2g== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1751124096385549455?= X-GMAIL-MSGID: =?utf-8?q?1751124096385549455?= Instead of duplicating the menu info, use the one from the core. Also, do not use extra memory for 1:1 mappings. Signed-off-by: Ricardo Ribalda Suggested-by: Laurent Pinchart --- drivers/media/usb/uvc/uvc_ctrl.c | 116 +++++++++++++++++++++++++------------ drivers/media/usb/uvc/uvc_driver.c | 9 +-- drivers/media/usb/uvc/uvc_v4l2.c | 81 ++++++++++++++++++++------ drivers/media/usb/uvc/uvcvideo.h | 3 +- include/uapi/linux/uvcvideo.h | 3 +- 5 files changed, 145 insertions(+), 67 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index 13bc57e2a08d..3bb1c97c7e11 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -362,19 +362,31 @@ static const u32 uvc_control_classes[] = { V4L2_CID_USER_CLASS, }; -static const struct uvc_menu_info power_line_frequency_controls[] = { - { 0, "Disabled" }, - { 1, "50 Hz" }, - { 2, "60 Hz" }, - { 3, "Auto" }, -}; +static const int exposure_auto_mapping[] = { 2, 1, 4, 8 }; -static const struct uvc_menu_info exposure_auto_controls[] = { - { 2, "Auto Mode" }, - { 1, "Manual Mode" }, - { 4, "Shutter Priority Mode" }, - { 8, "Aperture Priority Mode" }, -}; +static u32 uvc_mapping_get_menu_value(struct uvc_control_mapping *mapping, + u32 idx) +{ + if (!test_bit(idx, &mapping->menu_mask)) + return 0; + + if (mapping->menu_mapping) + return mapping->menu_mapping[idx]; + + return idx; +} + +static const char +*uvc_mapping_get_menu_name(struct uvc_control_mapping *mapping, u32 idx) +{ + if (!test_bit(idx, &mapping->menu_mask)) + return NULL; + + if (mapping->menu_names) + return mapping->menu_names[idx]; + + return v4l2_ctrl_get_menu(mapping->id)[idx]; +} static s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, u8 query, const u8 *data) @@ -523,9 +535,9 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_BITMASK, - .menu_info = exposure_auto_controls, + .menu_mapping = exposure_auto_mapping, .menu_mask = - BIT_MASK(ARRAY_SIZE(exposure_auto_controls)), + GENMASK(ARRAY_SIZE(exposure_auto_mapping) - 1, 0), .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, }, }, { @@ -730,9 +742,8 @@ static const struct uvc_control_mapping uvc_ctrl_mappings_uvc11[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_ENUM, - .menu_info = power_line_frequency_controls, .menu_mask = - BIT_MASK(ARRAY_SIZE(power_line_frequency_controls) - 1), + GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0), }, }; @@ -745,9 +756,8 @@ static const struct uvc_control_mapping uvc_ctrl_mappings_uvc15[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_ENUM, - .menu_info = power_line_frequency_controls, .menu_mask = - BIT_MASK(ARRAY_SIZE(power_line_frequency_controls)), + GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0), }, }; @@ -974,13 +984,17 @@ static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping, s32 value = mapping->get(mapping, UVC_GET_CUR, data); if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { - const struct uvc_menu_info *menu = mapping->menu_info; unsigned int i; - for (i = 1; BIT(i) <= mapping->menu_mask; ++i, ++menu) { + for (i = 1; BIT(i) <= mapping->menu_mask; ++i) { + u32 menu_value; + if (!test_bit(i, &mapping->menu_mask)) continue; - if (menu->value == value) { + + menu_value = uvc_mapping_get_menu_value(mapping, i); + + if (menu_value == value) { value = i; break; } @@ -1112,7 +1126,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, { struct uvc_control_mapping *master_map = NULL; struct uvc_control *master_ctrl = NULL; - const struct uvc_menu_info *menu; unsigned int i; memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl)); @@ -1157,11 +1170,15 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, v4l2_ctrl->maximum = fls(mapping->menu_mask) - 1; v4l2_ctrl->step = 1; - menu = mapping->menu_info; - for (i = 1; BIT(i) <= mapping->menu_mask; ++i, ++menu) { + for (i = 1; BIT(i) <= mapping->menu_mask; ++i) { + u32 menu_value; + if (!test_bit(i, &mapping->menu_mask)) continue; - if (menu->value == v4l2_ctrl->default_value) { + + menu_value = uvc_mapping_get_menu_value(mapping, i); + + if (menu_value == v4l2_ctrl->default_value) { v4l2_ctrl->default_value = i; break; } @@ -1254,11 +1271,11 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, int uvc_query_v4l2_menu(struct uvc_video_chain *chain, struct v4l2_querymenu *query_menu) { - const struct uvc_menu_info *menu_info; struct uvc_control_mapping *mapping; struct uvc_control *ctrl; u32 index = query_menu->index; u32 id = query_menu->id; + const char *name; int ret; memset(query_menu, 0, sizeof(*query_menu)); @@ -1280,11 +1297,10 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain, goto done; } - menu_info = &mapping->menu_info[query_menu->index]; - if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { s32 bitmap; + u32 menu_value; if (!ctrl->cached) { ret = uvc_ctrl_populate_cache(chain, ctrl); @@ -1292,15 +1308,22 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain, goto done; } + menu_value = uvc_mapping_get_menu_value(mapping, + query_menu->index); + bitmap = mapping->get(mapping, UVC_GET_RES, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); - if (!(bitmap & menu_info->value)) { + if (!(bitmap & menu_value)) { ret = -EINVAL; goto done; } } - strscpy(query_menu->name, menu_info->name, sizeof(query_menu->name)); + name = uvc_mapping_get_menu_name(mapping, query_menu->index); + if (name) + strscpy(query_menu->name, name, sizeof(query_menu->name)); + else + ret = -EINVAL; done: mutex_unlock(&chain->ctrl_mutex); @@ -1790,7 +1813,7 @@ int uvc_ctrl_set(struct uvc_fh *handle, if (!test_bit(xctrl->value, &mapping->menu_mask)) return -EINVAL; - value = mapping->menu_info[xctrl->value].value; + value = uvc_mapping_get_menu_value(mapping, xctrl->value); /* * Valid menu indices are reported by the GET_RES request for @@ -2239,12 +2262,28 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain, INIT_LIST_HEAD(&map->ev_subs); - size = sizeof(*mapping->menu_info) * fls(mapping->menu_mask); - map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL); - if (map->menu_info == NULL) { - kfree(map->name); - kfree(map); - return -ENOMEM; + if (mapping->menu_mapping && mapping->menu_mask) { + size = sizeof(mapping->menu_mapping[0]) * + fls(mapping->menu_mask); + map->menu_mapping = kmemdup(mapping->menu_mapping, size, + GFP_KERNEL); + if (!map->menu_mapping) { + kfree(map->name); + kfree(map); + return -ENOMEM; + } + } + if (mapping->menu_names && mapping->menu_mask) { + size = sizeof(mapping->menu_names[0]) * + fls(mapping->menu_mask); + map->menu_names = kmemdup(mapping->menu_names, size, + GFP_KERNEL); + if (!map->menu_names) { + kfree(map->menu_mapping); + kfree(map->name); + kfree(map); + return -ENOMEM; + } } if (map->get == NULL) @@ -2589,7 +2628,8 @@ static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev, list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) { list_del(&mapping->list); - kfree(mapping->menu_info); + kfree(mapping->menu_names); + kfree(mapping->menu_mapping); kfree(mapping->name); kfree(mapping); } diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 09cc459c1253..a8d2260cca1d 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -2661,11 +2661,6 @@ MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); * Driver initialization and cleanup */ -static const struct uvc_menu_info power_line_frequency_controls_limited[] = { - { 1, "50 Hz" }, - { 2, "60 Hz" }, -}; - static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = { .id = V4L2_CID_POWER_LINE_FREQUENCY, .entity = UVC_GUID_UVC_PROCESSING, @@ -2674,9 +2669,7 @@ static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_ENUM, - .menu_info = power_line_frequency_controls_limited, - .menu_mask = - BIT_MASK(ARRAY_SIZE(power_line_frequency_controls_limited)), + .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 1), }; static const struct uvc_device_info uvc_ctrl_power_line_limited = { diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index 07c7acce8025..75be164baf4d 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -25,6 +25,64 @@ #include "uvcvideo.h" +static int uvc_control_xu_2_mapping(struct uvc_control_mapping *map, + struct uvc_xu_control_mapping *xmap) +{ + char (*names)[UVC_MENU_NAME_LEN]; + unsigned int i; + u32 *mapping; + size_t size; + + /* Prevent excessive memory consumption, as well as integer + * overflows. + */ + if (xmap->menu_count == 0 || + xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) + return -EINVAL; + + map->menu_mask = BIT_MASK(xmap->menu_count); + + size = xmap->menu_count * sizeof(*map->menu_mapping); + mapping = kzalloc(size, GFP_KERNEL); + if (!mapping) + return -ENOMEM; + + for (i = 0; i < xmap->menu_count ; i++) + if (copy_from_user(&mapping[i], &xmap->menu_info[i].value, + sizeof(mapping[i]))) { + kfree(mapping); + return -ENOMEM; + } + + map->menu_mapping = mapping; + + /* + * Always use the standard naming if available. + */ + if (v4l2_ctrl_get_menu(map->id)) + return 0; + + size = xmap->menu_count * sizeof(map->menu_names[0]); + names = kzalloc(size, GFP_KERNEL); + if (!names) { + kfree(mapping); + return -ENOMEM; + } + + for (i = 0; i < xmap->menu_count ; i++) { + /* sizeof(names[i]) - 1: to take care of \0 */ + if (copy_from_user(&names[i], &xmap->menu_info[i].name, + sizeof(names[i]) - 1)) { + kfree(names); + kfree(mapping); + return -ENOMEM; + } + } + map->menu_names = names; + + return 0; +} + /* ------------------------------------------------------------------------ * UVC ioctls */ @@ -32,7 +90,6 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, struct uvc_xu_control_mapping *xmap) { struct uvc_control_mapping *map; - unsigned int size; int ret; map = kzalloc(sizeof(*map), GFP_KERNEL); @@ -63,24 +120,9 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, break; case V4L2_CTRL_TYPE_MENU: - /* - * Prevent excessive memory consumption, as well as integer - * overflows. - */ - if (xmap->menu_count == 0 || - xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) { - ret = -EINVAL; - goto free_map; - } - - size = xmap->menu_count * sizeof(*map->menu_info); - map->menu_info = memdup_user(xmap->menu_info, size); - if (IS_ERR(map->menu_info)) { - ret = PTR_ERR(map->menu_info); + ret = uvc_control_xu_2_mapping(map, xmap); + if (ret) goto free_map; - } - - map->menu_mask = BIT_MASK(xmap->menu_count); break; default: @@ -92,7 +134,8 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, ret = uvc_ctrl_add_mapping(chain, map); - kfree(map->menu_info); + kfree(map->menu_names); + kfree(map->menu_mapping); free_map: kfree(map); diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index fde4e975334f..2bb0a5951915 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -254,7 +254,8 @@ struct uvc_control_mapping { enum v4l2_ctrl_type v4l2_type; u32 data_type; - const struct uvc_menu_info *menu_info; + const u32 *menu_mapping; + const char (*menu_names)[UVC_MENU_NAME_LEN]; unsigned long menu_mask; u32 master_id; diff --git a/include/uapi/linux/uvcvideo.h b/include/uapi/linux/uvcvideo.h index 8288137387c0..1b64b6aa40b5 100644 --- a/include/uapi/linux/uvcvideo.h +++ b/include/uapi/linux/uvcvideo.h @@ -36,9 +36,10 @@ UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | \ UVC_CTRL_FLAG_GET_DEF) +#define UVC_MENU_NAME_LEN 32 struct uvc_menu_info { __u32 value; - __u8 name[32]; + __u8 name[UVC_MENU_NAME_LEN]; }; struct uvc_xu_control_mapping {