From patchwork Thu Sep 26 05:49:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 13812814 Received: from mail-qt1-f172.google.com (mail-qt1-f172.google.com [209.85.160.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A3833187348 for ; Thu, 26 Sep 2024 05:50:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727329817; cv=none; b=VVcijVweM5EfSrF5Jmt0ozJ4a+Imxau8bPtDdS16nXgWLb7MaOerRyo+8mIt5sU6KTKIJ4p26Xn8dETtPvHwKQsM2UMh5CicWKo4RGKOZfdiiPhzSqiixs/7r2PCguSsbl1L6VIWXiI3FjdfsetcCx6lty3vucgBoVGlvK/YNXc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727329817; c=relaxed/simple; bh=bp/AyInNx+sYmGScXTk/dVr8nFraf0tgtMRd3LHHRBg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ifcRvnIPW9lJJvBqDoMV04eNwx28igCELHwUWcaHP4JeECgo5jjJsO+65ZjYZuS+rKt+QLCb4C36HvLNxrxBKRdrocLSTfzPThPsU2GPYcgJfWQtgFaBxV/k9R0k3bxNt0DWmXY9vq9rZafo1NVGUV3sd+9pmeCs/XsEKC9louA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=WSS7ckOh; arc=none smtp.client-ip=209.85.160.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="WSS7ckOh" Received: by mail-qt1-f172.google.com with SMTP id d75a77b69052e-45832b2784bso4352931cf.3 for ; Wed, 25 Sep 2024 22:50:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1727329814; x=1727934614; darn=vger.kernel.org; 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=1Jte9oqU3bEqLQEq3uaVn2nHKDdidO4uVkSl6injc2E=; b=WSS7ckOh7Rgcph7n8Z2LsZEk84OufCi6Ire0pDgM1fLfl9cILAbeVnpxUys1yMaL1M UoT6k0dJR8xaCvtgaFywqDbzaPhe1T1wLUpUiSg7HPbAQKi7Qm0Bz48cR86NU3Lu9gWb SeOyuibY33nC3nyEIXBcPn0izyvEM70KXUZy0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727329814; x=1727934614; 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=1Jte9oqU3bEqLQEq3uaVn2nHKDdidO4uVkSl6injc2E=; b=dt44pkUZT3UribvKzUBdrcKoXtVba+LqcrMb5MWgrKrGjnduluOWB6KEtJ+YGkMo56 FYVyqUfcdR97D5ZYdPSD8FwK1F7YCg/aBqyDq1jmB72moGP5i7J2LWyBTEXiO9DQjoUY b2ijscvbr0VJ87Nbg7bNNW/vbpxyXhYH5J9KDldjjWybCQ8EzYI/yLc1LxTUmXywZa5e cS7weKlWCaVr4QUuCOmPrrP4theWjZ3C7S470V+12PWfW/YW9lA7zDOhi9vTkiu5Yfvg UTOxwA8Ud+gD21Ce62zjat8QXvteRhAPD+8Ik0z9VCkqL+U6PhUeCt7Gyyq0z01s3ZWv gqRQ== X-Forwarded-Encrypted: i=1; AJvYcCXazV1Sei5CW5Vs2gDI97OD2YGfxghzZjDRyHCKEM8pwzloNUAjb3bd+XUkFcHAQ+EdwPt7+IpxTp6Xfg==@vger.kernel.org X-Gm-Message-State: AOJu0Ywu+wuG/GrLWqr1KptxYGgmnYsejT/LNC+nBEgkrNpk1pGebyze 5Vyfi6lWaDpjehvl8BSLEk67koIip84reVFex+69KPil2wGly+AiHloNObNr7g== X-Google-Smtp-Source: AGHT+IFxCfHwEy321Bw8EBQt293rqr5m34pmJLEgFglHcCaIk+ih11NQYLPeHDvPTI9jJvdqYBjNuQ== X-Received: by 2002:ac8:5885:0:b0:456:94fe:dcdf with SMTP id d75a77b69052e-45b5def4674mr65467061cf.35.1727329814538; Wed, 25 Sep 2024 22:50:14 -0700 (PDT) Received: from denia.c.googlers.com (76.224.245.35.bc.googleusercontent.com. [35.245.224.76]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-45b5264b629sm22406781cf.64.2024.09.25.22.50.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Sep 2024 22:50:13 -0700 (PDT) From: Ricardo Ribalda Date: Thu, 26 Sep 2024 05:49:59 +0000 Subject: [PATCH v7 3/3] media: uvcvideo: Exit early if there is not int_urb Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240926-guenter-mini-v7-3-690441953d4a@chromium.org> References: <20240926-guenter-mini-v7-0-690441953d4a@chromium.org> In-Reply-To: <20240926-guenter-mini-v7-0-690441953d4a@chromium.org> To: Mauro Carvalho Chehab Cc: Guenter Roeck , Tomasz Figa , Laurent Pinchart , Alan Stern , Hans Verkuil , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Sean Paul , Ricardo Ribalda , Sakari Ailus , Sergey Senozhatsky X-Mailer: b4 0.13.0 If there is no int_urb there is no need to do a clean stop. Also we avoid calling usb_kill_urb(NULL). It is properly handled by the usb framework, but it is not polite. Now that we are at it, fix the code style in uvc_status_start() for consistency. Reviewed-by: Laurent Pinchart Reviewed-by: Sergey Senozhatsky Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_status.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c index d8d5b327693f..c7901ac32c26 100644 --- a/drivers/media/usb/uvc/uvc_status.c +++ b/drivers/media/usb/uvc/uvc_status.c @@ -308,7 +308,7 @@ static int uvc_status_start(struct uvc_device *dev, gfp_t flags) { lockdep_assert_held(&dev->status_lock); - if (dev->int_urb == NULL) + if (!dev->int_urb) return 0; return usb_submit_urb(dev->int_urb, flags); @@ -320,6 +320,9 @@ static void uvc_status_stop(struct uvc_device *dev) lockdep_assert_held(&dev->status_lock); + if (!dev->int_urb) + return; + /* * Prevent the asynchronous control handler from requeing the URB. The * barrier is needed so the flush_status change is visible to other