From patchwork Wed Dec 14 11:23:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 635093 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 4E06BC4332F for ; Wed, 14 Dec 2022 11:24:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237987AbiLNLYS (ORCPT ); Wed, 14 Dec 2022 06:24:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238257AbiLNLYH (ORCPT ); Wed, 14 Dec 2022 06:24:07 -0500 Received: from mail-ej1-x62c.google.com (mail-ej1-x62c.google.com [IPv6:2a00:1450:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 687372496D for ; Wed, 14 Dec 2022 03:24:05 -0800 (PST) Received: by mail-ej1-x62c.google.com with SMTP id u19so25227511ejm.8 for ; Wed, 14 Dec 2022 03:24:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:from:to:cc:subject:date:message-id:reply-to; bh=BRQpccloQiMZN4saRLUHMMeZBeRRnRn5nkbaL4W4GdU=; b=mwASJg7dtkUG02UasdQmC3cun9vteqzuLzNZuEfl5IFp8nZSRnBiOd2AN6o8Ptgw2Z pvT8LqBY7JcJpyJZ3CWH4+kS+eUEgoIus89lWz+D4dTLTttUEKVTq+tXpyvgqRSojCb8 sQCo88l4SCYGUDiORZXAAU5iWOUKxfJEMKTds= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=BRQpccloQiMZN4saRLUHMMeZBeRRnRn5nkbaL4W4GdU=; b=UL/yf5qMhFBAzqC1fzBKHOborw3gW7qJafZnNd7Hb/KFwJojnwy60WCQ3tqbTiSAck Ql/Dn9F++9rQ2fsrG1wwndkZOxwG4pTHcjnUzlakKRq978Y9N+p9Aoh3NWrMWFrWMuZt Neqp2x23u2mgGx+OHA0g0PYm2G+kaHxYOm1th2OG7YcuZNzUGH3A32oOou2k7M3QsefU bA4zLEibTBVCPdAvyprQbOSGlrNyFt19/hb0juUGLL5kZeN/tkQPBBRPo0eUUaoUZor3 O7L1U+gGt6/UWw06THItz7HaQi/Z12R8lrSPVyGvMd/hGebBt51y3v6OkkmzV3DAlz95 olbw== X-Gm-Message-State: ANoB5pmD0XGAFzBqlwA9vhlRjN2NUKDsEFzYKQs1gmuOxrEGFs0GUum/ DfymOSTDpWr5ZlaoqBmN2uzZdg== X-Google-Smtp-Source: AA0mqf7Lbg5q0PavkIILmyF6Ukl4kk1jJdlArz22SF/saRlUTu0DIqR+15W2gUVLdypqucYC97XfNg== X-Received: by 2002:a17:907:9208:b0:7c0:d605:fe42 with SMTP id ka8-20020a170907920800b007c0d605fe42mr15215915ejb.18.1671017044038; Wed, 14 Dec 2022 03:24:04 -0800 (PST) Received: from alco.roam.corp.google.com ([100.104.168.209]) by smtp.gmail.com with ESMTPSA id g17-20020a17090604d100b007c17b3a4163sm3034995eja.15.2022.12.14.03.24.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Dec 2022 03:24:03 -0800 (PST) From: Ricardo Ribalda Date: Wed, 14 Dec 2022 12:23:41 +0100 Subject: [PATCH] media: uvcvideo: Do not alloc dev->status MIME-Version: 1.0 Message-Id: <20221214-uvc-status-alloc-v1-0-a0098ddc7c93@chromium.org> To: Yunke Cao , Max Staudt , Mauro Carvalho Chehab , Sergey Senozhatsky , Laurent Pinchart Cc: Ricardo Ribalda , 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=7349; i=ribalda@chromium.org; h=from:subject:message-id; bh=bxfPn7ndbrz/ZOaMZwhhHYT3BZ1JIWXtS1bv+cB42RY=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjmbJQXMjwj6w6yc+iZ1CWllvZyH9AaydNC98PtykB ra5QDDKJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY5myUAAKCRDRN9E+zzrEiONRD/ 43kbS55hMa3GJ7Jutk+c5+EU78NyNML+a4CXq9Huq08vGgih7ggyMFEr3dJDFQIfBOFczn6DqTrRYG dsVnh8fE3AIcrdWVIWzWJ/7UgnpIpE8wrgh5rcxzJszqO59nV35qvhDdsloNjyHHckjg3G6dgMf1W2 Z+N0D+rMdfu6xSshXNiL/ZAKEZ3XfDDDKC/HKBq0gJ7Iaw6ibp69bisc6Bp9RNnKl9Ja9nCvyel76D Ax8/rWkAHDSK2C/gZNaHWJBu/vSdHGXA6jD/piT12K+7yn0CuPC2EOZkleK27kBLY5VLxzpF1B8wVs l6Fu5km8y8kY90ArYa3RdxF4qdGqw9/jAP1P0PyDKOfoGaudHYVkj6lIsWAvRMC4eVl/X3FAOWOFnj BSMlj7tTpa1AZMyKI2E1iZKMqZd9s8X6dsUdrdlkiuQBNEMn5INoxuPyQgUJaS6zOR4q7B2AsmiMkz u2y+0WOkkttPdUg+UKS53lDx/bZSOKAHBDZcbqPgxBtfCiwC3lfqfZhBQ3WO0bot/pZ/ePg3TiGmzj 9+mGNddSlv1f25g7CNrzaLSQOkqH8GpQfH+Kbtiq5VGUc7HR/rdVflbC3b81d4mgPeH6IljEP2jsR3 U8x57f8bZiNEB5Vx4dTfvxy2F/Z7LohL+5I4RmZA9WfbLlWwV6HGXAl4TEFA== 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. Now that we are at it, remove all the castings. Signed-off-by: Ricardo Ribalda --- To: Yunke Cao To: Sergey Senozhatsky To: Max Staudt To: Laurent Pinchart To: Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- drivers/media/usb/uvc/uvc_status.c | 69 ++++++++++++-------------------------- drivers/media/usb/uvc/uvcvideo.h | 22 +++++++++++- 2 files changed, 42 insertions(+), 49 deletions(-) --- base-commit: 0ec5a38bf8499f403f81cb81a0e3a60887d1993c change-id: 20221214-uvc-status-alloc-93becb783898 Best regards, diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c index 7518ffce22ed..adf63e7616c9 100644 --- a/drivers/media/usb/uvc/uvc_status.c +++ b/drivers/media/usb/uvc/uvc_status.c @@ -73,38 +73,24 @@ static void uvc_input_report_key(struct uvc_device *dev, unsigned int code, /* -------------------------------------------------------------------------- * Status interrupt endpoint */ -struct uvc_streaming_status { - u8 bStatusType; - u8 bOriginator; - u8 bEvent; - u8 bValue[]; -} __packed; - -struct uvc_control_status { - u8 bStatusType; - u8 bOriginator; - u8 bEvent; - u8 bSelector; - u8 bAttribute; - u8 bValue[]; -} __packed; - static void uvc_event_streaming(struct uvc_device *dev, - struct uvc_streaming_status *status, int len) + struct uvc_status *status, int len) { - if (len < 3) { + if (len <= offsetof(struct uvc_status, bEvent)) { uvc_dbg(dev, STATUS, "Invalid streaming status event received\n"); return; } if (status->bEvent == 0) { - if (len < 4) + if (len <= offsetof(struct uvc_status, streaming)) return; + uvc_dbg(dev, STATUS, "Button (intf %u) %s len %d\n", status->bOriginator, - status->bValue[0] ? "pressed" : "released", len); - uvc_input_report_key(dev, KEY_CAMERA, status->bValue[0]); + status->streaming.button ? "pressed" : "released", len); + uvc_input_report_key(dev, KEY_CAMERA, + status->streaming.button); } else { uvc_dbg(dev, STATUS, "Stream %u error event %02x len %d\n", status->bOriginator, status->bEvent, len); @@ -131,7 +117,7 @@ static struct uvc_control *uvc_event_entity_find_ctrl(struct uvc_entity *entity, } static struct uvc_control *uvc_event_find_ctrl(struct uvc_device *dev, - const struct uvc_control_status *status, + const struct uvc_status *status, struct uvc_video_chain **chain) { list_for_each_entry((*chain), &dev->chains, list) { @@ -143,7 +129,7 @@ static struct uvc_control *uvc_event_find_ctrl(struct uvc_device *dev, continue; ctrl = uvc_event_entity_find_ctrl(entity, - status->bSelector); + status->control.bSelector); if (ctrl) return ctrl; } @@ -153,7 +139,7 @@ static struct uvc_control *uvc_event_find_ctrl(struct uvc_device *dev, } static bool uvc_event_control(struct urb *urb, - const struct uvc_control_status *status, int len) + const struct uvc_status *status, int len) { static const char *attrs[] = { "value", "info", "failure", "min", "max" }; struct uvc_device *dev = urb->context; @@ -161,24 +147,24 @@ static bool uvc_event_control(struct urb *urb, struct uvc_control *ctrl; if (len < 6 || status->bEvent != 0 || - status->bAttribute >= ARRAY_SIZE(attrs)) { + status->control.bAttribute >= ARRAY_SIZE(attrs)) { uvc_dbg(dev, STATUS, "Invalid control status event received\n"); return false; } uvc_dbg(dev, STATUS, "Control %u/%u %s change len %d\n", - status->bOriginator, status->bSelector, - attrs[status->bAttribute], len); + status->bOriginator, status->control.bSelector, + attrs[status->control.bAttribute], len); /* Find the control. */ ctrl = uvc_event_find_ctrl(dev, status, &chain); if (!ctrl) return false; - switch (status->bAttribute) { + switch (status->control.bAttribute) { case UVC_CTRL_VALUE_CHANGE: return uvc_ctrl_status_event_async(urb, chain, ctrl, - status->bValue); + status->control.bValue); case UVC_CTRL_INFO_CHANGE: case UVC_CTRL_FAILURE_CHANGE: @@ -214,28 +200,22 @@ static void uvc_status_complete(struct urb *urb) len = urb->actual_length; if (len > 0) { - switch (dev->status[0] & 0x0f) { + switch (dev->status.bStatusType & 0x0f) { case UVC_STATUS_TYPE_CONTROL: { - struct uvc_control_status *status = - (struct uvc_control_status *)dev->status; - - if (uvc_event_control(urb, status, len)) + if (uvc_event_control(urb, &dev->status, len)) /* The URB will be resubmitted in work context. */ return; break; } case UVC_STATUS_TYPE_STREAMING: { - struct uvc_streaming_status *status = - (struct uvc_streaming_status *)dev->status; - - uvc_event_streaming(dev, status, len); + uvc_event_streaming(dev, &dev->status, len); break; } default: uvc_dbg(dev, STATUS, "Unknown status event type %u\n", - dev->status[0]); + dev->status.bStatusType); break; } } @@ -259,15 +239,9 @@ 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); @@ -281,7 +255,7 @@ int uvc_status_init(struct uvc_device *dev) interval = fls(interval) - 1; usb_fill_int_urb(dev->int_urb, dev->udev, pipe, - dev->status, UVC_MAX_STATUS_SIZE, uvc_status_complete, + &dev->status, sizeof(dev->status), uvc_status_complete, dev, interval); return 0; @@ -296,7 +270,6 @@ 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 df93db259312..cdd2e328acc2 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -527,6 +527,26 @@ struct uvc_device_info { const struct uvc_control_mapping **mappings; }; +struct uvc_status_streaming { + u8 button; +} __packed; + +struct uvc_status_control { + u8 bSelector; + u8 bAttribute; + u8 bValue[11]; +} __packed; + +struct uvc_status { + u8 bStatusType; + u8 bOriginator; + u8 bEvent; + union { + struct uvc_status_control control; + struct uvc_status_streaming streaming; + }; +} __packed; + struct uvc_device { struct usb_device *udev; struct usb_interface *intf; @@ -559,7 +579,7 @@ struct uvc_device { /* Status Interrupt Endpoint */ struct usb_host_endpoint *int_ep; struct urb *int_urb; - u8 *status; + struct uvc_status status; struct input_dev *input; char input_phys[64];