[v2,0/2] media: usb: hdpvr: make use of quirk flags from I2C core

Message ID	20250522080953.27323-4-wsa+renesas@sang-engineering.com
Headers	show Received: from mail.zeus03.de (zeus03.de [194.117.254.33]) (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 930EB261575 for <linux-i2c@vger.kernel.org>; Thu, 22 May 2025 08:10:14 +0000 (UTC) From: Wolfram Sang <wsa+renesas@sang-engineering.com> To: linux-i2c@vger.kernel.org Cc: Alan Stern <stern@rowland.harvard.edu>, Nikita Zhandarovich <n.zhandarovich@fintech.ru>, Wolfram Sang <wsa+renesas@sang-engineering.com>, Hans Verkuil <hverkuil@xs4all.nl>, linux-media@vger.kernel.org, Mauro Carvalho Chehab <mchehab@kernel.org> Subject: [PATCH v2 0/2] media: usb: hdpvr: make use of quirk flags from I2C core Date: Thu, 22 May 2025 10:09:53 +0200 Message-ID: <20250522080953.27323-4-wsa+renesas@sang-engineering.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	media: usb: hdpvr: make use of quirk flags from I2C core \| expand [v2,0/2] media: usb: hdpvr: make use of quirk flags from I2C core [v2,1/2] media: usb: hdpvr: disable zero-length read messages [v2,2/2] media: usb: hdpvr: use I2C core to handle only supported messages

Message ID

20250522080953.27323-4-wsa+renesas@sang-engineering.com

Headers

From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
Cc: Alan Stern <stern@rowland.harvard.edu>,
	Nikita Zhandarovich <n.zhandarovich@fintech.ru>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Hans Verkuil <hverkuil@xs4all.nl>,
	linux-media@vger.kernel.org,
	Mauro Carvalho Chehab <mchehab@kernel.org>
Subject: [PATCH v2 0/2] media: usb: hdpvr: make use of quirk flags from I2C
 core
Date: Thu, 22 May 2025 10:09:53 +0200
Message-ID: <20250522080953.27323-4-wsa+renesas@sang-engineering.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

Series

media: usb: hdpvr: make use of quirk flags from I2C core | expand

Message

Wolfram Sang May 22, 2025, 8:09 a.m. UTC

We found a pattern that could create USB protocol violations for devices
which embed an I2C bus and use I2C message lengths directly. Patch 1
fixes the bug for this driver by using a quirk flag. Patch 2 is a
cleanup to remove a pattern in the driver which can also be handled with
a quirk flag.

Changes since v1:
- removed now superfluous label in patch 2

Wolfram Sang (2):
  media: usb: hdpvr: disable zero-length read messages
  media: usb: hdpvr: use I2C core to handle only supported messages

 drivers/media/usb/hdpvr/hdpvr-i2c.c | 30 ++++++++---------------------
 1 file changed, 8 insertions(+), 22 deletions(-)