From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1A18B13E02A; Tue, 23 Jun 2026 01:36:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782178566; cv=none; b=catx9j2K2kc8BPa3n4O4J6aiUCFJBDiMWD3jzzxaCuYQV0PNbXR/NjHT1gOmRdEhohyuJHls6tbOsBZOD8qWGIrbUHfe1X5hQrvpRY8egSqcNTOjiBSKACJGWsCd3h6XAq+cHboORCYOQZ6hs6O8U68be6EevkDiu60iqdwUPKU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782178566; c=relaxed/simple; bh=GU/TLN5+AXYBrgYQp3TR7/+mU6pGPFPmdcGJUjM5drU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=msHglbaFhqrT2MlsqmeQdWGDQoUmaugUprsKjdNY1x//2NaoGxxx39g5LsTupnj02slFzbppUtMTUEF/4sRuejWi5idOEXTpMYPAlRMTMnzfimYnCc+agJex83uFQ318xwVgkUvlhTHh4o2W+qfLEdRLWOrPm1liaUzGzT1KKdo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ME7DX9QD; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ME7DX9QD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2B1F1F000E9; Tue, 23 Jun 2026 01:36:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782178564; bh=4RzSVQZfLfUWVloRvW8WQwsQzXMTtdGDDk65dBN8wKE=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=ME7DX9QDi13idCQ5hTJaphmmSlTqZ/FJDyvoxTeD49IwchQmgy0HlpDSz/MIlVIkr U/P06n7ytV+oqkTD/lLOAM7QkER3Te+UmMMalgB4/pNuDGPzcRdUvN6igwJiJT8HnQ fe0W/l1honTeRlBVk+5RBCR+2WBlyJAmjHv4LfJQA6/qfNu4hOTtDLggZM9Uoy2txE aACTBs1bHHkH7QAWJWL/6LMQL+qiLj3GpZwoaGVG5D74I5XpqxCYmM8qqp2h/VI5pg x5CcGxnfU4AhKWGwMUK8rw5YH7Rfee1fqACN5r10s18b91bJ7Lx7q2XVRWXnqKkRQc 7sBDfTnnQclyg== Message-ID: Date: Tue, 23 Jun 2026 02:35:52 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] media: as102: drop device reference on probe failure To: Jiawen Liu <1298662399@qq.com>, mchehab@kernel.org Cc: hverkuil+cisco@kernel.org, kees@kernel.org, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org References: From: Bryan O'Donoghue Content-Language: en-US Autocrypt: addr=bod@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 20/06/2026 09:40, Jiawen Liu wrote: > as102_usb_probe() initializes the kref and takes a USB device > reference before registering the USB minor. > > If stream allocation or DVB registration fails later, the error > path deregisters the minor but does not drop the initial kref. > > Use kref_put() so as102_usb_release() drops the USB reference. > > Signed-off-by: Jiawen Liu <1298662399@qq.com> > --- > drivers/media/usb/as102/as102_usb_drv.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/media/usb/as102/as102_usb_drv.c b/drivers/media/usb/as102/as102_usb_drv.c > index a11024451ceb..ad6c5837f1d7 100644 > --- a/drivers/media/usb/as102/as102_usb_drv.c > +++ b/drivers/media/usb/as102/as102_usb_drv.c > @@ -405,6 +405,7 @@ static int as102_usb_probe(struct usb_interface *intf, > failed_stream: > usb_set_intfdata(intf, NULL); > usb_deregister_dev(intf, &as102_usb_class_driver); > + kref_put(&as102_dev->kref, as102_usb_release); > return ret; > failed: > usb_put_dev(as102_dev->bus_adap.usb_dev); > > base-commit: 9e7e6633458362db72427b48effad8d759131c35 > -- > 2.34.1 > > Missing a Fixes: and Cc: stable But also why not: ➜ git diff diff --git a/drivers/media/usb/as102/as102_usb_drv.c b/drivers/media/usb/as102/as102_usb_drv.c index a11024451cebd..8e480ab78f9b2 100644 --- a/drivers/media/usb/as102/as102_usb_drv.c +++ b/drivers/media/usb/as102/as102_usb_drv.c @@ -403,9 +403,7 @@ static int as102_usb_probe(struct usb_interface *intf, failed_dvb: as102_free_usb_stream_buffer(as102_dev); failed_stream: - usb_set_intfdata(intf, NULL); usb_deregister_dev(intf, &as102_usb_class_driver); - return ret; failed: usb_put_dev(as102_dev->bus_adap.usb_dev); usb_set_intfdata(intf, NULL); Which is the logical inversion of the setup ? --- bod