From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B25E3194A59; Wed, 5 Jun 2024 11:49:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717588178; cv=none; b=NOmG98uHpcleLq3mDWONVMt4f2m9l715L9UYV6xDsYha0WWhPeCOyHAJ3E5YsRtMSVRZdZ/JMqF8sbRNDn+8kEX0PVW9J1pXkooOFpjgCL2ekl7mIxQMsV+HJKgM87AoYyZXCk0/h2dTjWAENHuGB/rKeHTT6ysKQ84yGr1Dkak= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717588178; c=relaxed/simple; bh=Lt+FpEM0jPpr3XwvPw7UJ/AendB5vN0IPjs2xeR8CQQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IPi5n9RI4eb+52cKfrpkKjGBZ5iKctUTjhWz5x4/qEu47YFbdFO1S2CQBoLrU5S1P7m7DMG4cr0YrrwIby3on/5K06dadzUMaWfWdyH9OiUYSvr1MRKOjIMwj2poVtYlLk8gvHfGQ5l6knpimVn29P9RwcD9mm2EyxJEa1V33nk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WWQ93HML; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WWQ93HML" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7315DC32781; Wed, 5 Jun 2024 11:49:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1717588178; bh=Lt+FpEM0jPpr3XwvPw7UJ/AendB5vN0IPjs2xeR8CQQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WWQ93HMLVY36B5UvTE6VhcM41YfJRBGipLArVmenHVlvs+H3b8BDCOJOZaSbsjZat OER+SCSwxAoQoPYdCYrLt2agyXFLPsMKO5mdJ0cO7uoTJpjwRQy2lm2f2aKmwbJSTZ VVh6Z67lFTf3jZfulEi24SAOpynf0dQ6bSPqsqICkp878Te5TLfbT85VUFFdkI2vn1 990tIxH6G5C4VZ4uTbaX2EMPRZXVoeaESWQ9BxfqmrYoAVcW5a+3PvlsCTK94f+HJq IOjSRfuGyV7R2xmTsMR8pjJgmct668+W1+IbqDhe1RU8LWhD+/+EJpktm38yne25p4 nF5Jgzi/Lpglw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alex Henrie , Greg Kroah-Hartman , Sasha Levin , sudipm.mukherjee@gmail.com, linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 6.9 05/28] usb: misc: uss720: check for incompatible versions of the Belkin F5U002 Date: Wed, 5 Jun 2024 07:48:34 -0400 Message-ID: <20240605114927.2961639-5-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240605114927.2961639-1-sashal@kernel.org> References: <20240605114927.2961639-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.9.3 Content-Transfer-Encoding: 8bit From: Alex Henrie [ Upstream commit 3295f1b866bfbcabd625511968e8a5c541f9ab32 ] The incompatible device in my possession has a sticker that says "F5U002 Rev 2" and "P80453-B", and lsusb identifies it as "050d:0002 Belkin Components IEEE-1284 Controller". There is a bug report from 2007 from Michael Trausch who was seeing the exact same errors that I saw in 2024 trying to use this cable. Link: https://lore.kernel.org/all/46DE5830.9060401@trausch.us/ Signed-off-by: Alex Henrie Link: https://lore.kernel.org/r/20240326150723.99939-5-alexhenrie24@gmail.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/misc/uss720.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/usb/misc/uss720.c b/drivers/usb/misc/uss720.c index b00d92db5dfd1..eb5a8e0d9e2d6 100644 --- a/drivers/usb/misc/uss720.c +++ b/drivers/usb/misc/uss720.c @@ -677,7 +677,7 @@ static int uss720_probe(struct usb_interface *intf, struct parport_uss720_private *priv; struct parport *pp; unsigned char reg; - int i; + int ret; dev_dbg(&intf->dev, "probe: vendor id 0x%x, device id 0x%x\n", le16_to_cpu(usbdev->descriptor.idVendor), @@ -688,8 +688,8 @@ static int uss720_probe(struct usb_interface *intf, usb_put_dev(usbdev); return -ENODEV; } - i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2); - dev_dbg(&intf->dev, "set interface result %d\n", i); + ret = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2); + dev_dbg(&intf->dev, "set interface result %d\n", ret); interface = intf->cur_altsetting; @@ -725,12 +725,18 @@ static int uss720_probe(struct usb_interface *intf, set_1284_register(pp, 7, 0x00, GFP_KERNEL); set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */ set_1284_register(pp, 2, 0x0c, GFP_KERNEL); - /* debugging */ - get_1284_register(pp, 0, ®, GFP_KERNEL); + + /* The Belkin F5U002 Rev 2 P80453-B USB parallel port adapter shares the + * device ID 050d:0002 with some other device that works with this + * driver, but it itself does not. Detect and handle the bad cable + * here. */ + ret = get_1284_register(pp, 0, ®, GFP_KERNEL); dev_dbg(&intf->dev, "reg: %7ph\n", priv->reg); + if (ret < 0) + return ret; - i = usb_find_last_int_in_endpoint(interface, &epd); - if (!i) { + ret = usb_find_last_int_in_endpoint(interface, &epd); + if (!ret) { dev_dbg(&intf->dev, "epaddr %d interval %d\n", epd->bEndpointAddress, epd->bInterval); } -- 2.43.0