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 9BB3D768F6; Tue, 23 Jan 2024 02:05:21 +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=1705975521; cv=none; b=UYeCOy8g34dLVt+rxbhauvHFQAaTcSRqawrmZfAeUhZOpQ8GrO2Wp/nvciy/HnR06MK/cQjNZ9/sbkNDPGxAZJgWkmrvKJJtd2jZrvEzoq25KGpo67vaux8QPwsfH54C+17uZ6YCmLe9ETA8Ti67nYdAjMsDK/IqHv2i57DAu4g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705975521; c=relaxed/simple; bh=gtHjBfq3jTpoowGZLSW/SUi7DM5Eakb5W3dRND937YE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KnbkIym7cFF7Xnt86JmhA0VFFJqKk8vmL15ZpbR4TZXebszTDnF8d/eSNYlq6NqqL8WDwO6cESzrGQ99AD2PDNDeKyev/dJlzmu0Stl8WbSFb/L5Rz37bgehvW/VijPvEW4Aelxfam4lsm0mfrCEzeH6akZuw6c8UMbdMKKfGVU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cntJEcIg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="cntJEcIg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63386C433F1; Tue, 23 Jan 2024 02:05:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1705975521; bh=gtHjBfq3jTpoowGZLSW/SUi7DM5Eakb5W3dRND937YE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cntJEcIgw1Zf/nfCFGrTz1C9zwopSFhJMtiZzxKP/e8NCjpxwbr6tOvgErFZCGNdu MmKtTRksUxYONWIBSRHpKYtDO+YNPyhVF3UtUARY45EPITTvjCpA/6vMKUXygCEw/D pcj6zNEy58tv5CxQ6m0QJ1+5c7+GiQtOW4pzavLQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Alan Stern , Douglas Anderson , Grant Grundler , Sasha Levin Subject: [PATCH 6.6 465/583] r8152: Choose our USB config with choose_configuration() rather than probe() Date: Mon, 22 Jan 2024 15:58:36 -0800 Message-ID: <20240122235826.215051259@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122235812.238724226@linuxfoundation.org> References: <20240122235812.238724226@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Douglas Anderson [ Upstream commit aa4f2b3e418e8673e55145de8b8016a7a9920306 ] If you deauthorize the r8152 device (by writing 0 to the "authorized" field in sysfs) and then reauthorize it (by writing a 1) then it no longer works. This is because when you do the above we lose the special configuration that we set in rtl8152_cfgselector_probe(). Deauthorizing causes the config to be set to -1 and then reauthorizing runs the default logic for choosing the best config. I made an attempt to fix it so that the config is kept across deauthorizing / reauthorizing [1] but it was a bit ugly. Let's instead use the new USB core feature to override choose_configuration(). This patch relies upon the patches ("usb: core: Don't force USB generic_subclass drivers to define probe()") and ("usb: core: Allow subclassed USB drivers to override usb_choose_configuration()") [1] https://lore.kernel.org/r/20231130154337.1.Ie00e07f07f87149c9ce0b27ae4e26991d307e14b@changeid Fixes: ec51fbd1b8a2 ("r8152: add USB device driver for config selection") Suggested-by: Alan Stern Signed-off-by: Douglas Anderson Reviewed-by: Grant Grundler Link: https://lore.kernel.org/r/20231201102946.v2.3.Ie00e07f07f87149c9ce0b27ae4e26991d307e14b@changeid Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/net/usb/r8152.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 127b34dcc5b3..cca5b81c8b18 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -10036,7 +10036,7 @@ static struct usb_driver rtl8152_driver = { .disable_hub_initiated_lpm = 1, }; -static int rtl8152_cfgselector_probe(struct usb_device *udev) +static int rtl8152_cfgselector_choose_configuration(struct usb_device *udev) { struct usb_host_config *c; int i, num_configs; @@ -10063,19 +10063,13 @@ static int rtl8152_cfgselector_probe(struct usb_device *udev) if (i == num_configs) return -ENODEV; - if (usb_set_configuration(udev, c->desc.bConfigurationValue)) { - dev_err(&udev->dev, "Failed to set configuration %d\n", - c->desc.bConfigurationValue); - return -ENODEV; - } - - return 0; + return c->desc.bConfigurationValue; } static struct usb_device_driver rtl8152_cfgselector_driver = { - .name = MODULENAME "-cfgselector", - .probe = rtl8152_cfgselector_probe, - .id_table = rtl8152_table, + .name = MODULENAME "-cfgselector", + .choose_configuration = rtl8152_cfgselector_choose_configuration, + .id_table = rtl8152_table, .generic_subclass = 1, .supports_autosuspend = 1, }; -- 2.43.0