4cZm9K4kaAHCnDvdpsI8MNQ5qVJrV+WGiemn39rVuxwsuowhvgCsLqLUV3nMnXF/Gd+sbFFVrzn2V91FBLA7ab26nHv68chi58hTtKbDBRLCwn+i62hHMgsLqTTQXPvTUexBWgOWLg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dKg4i6z+; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2EF47C4CEF1; Mon, 27 Oct 2025 07:25:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1761549950; bh=DL6CapESvFZvh/Q4qC+k6zqolKWwHywYpo1WXdjs5sE=; h=Subject:To:Cc:From:Date:From; b=dKg4i6z+357JppDXwGI+HWY1wCYWqo7FIt0G34os5lUH5TZDzJHMaisBSLeH2By1H 6u6ZakxvtITnHoKeMiLpuvabzuv/3wqqaCTnfS/k5asyGOThiRb9gjD3/1aPcPG6uw F4ITIcw/PRv9RXYw2u8+ci02dED9tbCEO8fW2r3E= Subject: FAILED: patch "[PATCH] serial: sc16is7xx: remove useless enable of enhanced features" failed to apply to 6.1-stable tree To: hvilleneuve@dimonoff.com,gregkh@linuxfoundation.org,stable@kernel.org Cc: From: Date: Mon, 27 Oct 2025 08:25:39 +0100 Message-ID: <2025102739-fable-reroute-e6a6@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit X-DKIM: signer='linuxfoundation.org' status='pass' reason='' DKIMCheck: Server passes DKIM test, 0 Spam score X-Spam-Score: 0.4 (/) X-Spam-Report: Spam detection software, running on the system "witcher.mxrouting.net", has performed the tests listed below against this email. Information: https://mxroutedocs.com/directadmin/spamfilters/ --- Content analysis details: (0.4 points) --- pts rule name description ---- ---------------------- ----------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: linuxfoundation.org] 1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -1.0 MAILING_LIST_MULTI Multiple indicators imply a widely-seen list manager -0.0 DKIMWL_WL_HIGH DKIMwl.org - High trust sender SpamTally: Final spam score: 4 The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 1c05bf6c0262f946571a37678250193e46b1ff0f # git commit -s git send-email --to '' --in-reply-to '2025102739-fable-reroute-e6a6@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1c05bf6c0262f946571a37678250193e46b1ff0f Mon Sep 17 00:00:00 2001 From: Hugo Villeneuve Date: Mon, 6 Oct 2025 10:20:02 -0400 Subject: [PATCH] serial: sc16is7xx: remove useless enable of enhanced features Commit 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed") permanently enabled access to the enhanced features in sc16is7xx_probe(), and it is never disabled after that. Therefore, remove re-enable of enhanced features in sc16is7xx_set_baud(). This eliminates a potential useless read + write cycle each time the baud rate is reconfigured. Fixes: 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed") Cc: stable Signed-off-by: Hugo Villeneuve Link: https://patch.msgid.link/20251006142002.177475-1-hugo@hugovil.com Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 1a2c4c14f6aa..c7435595dce1 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -588,13 +588,6 @@ static int sc16is7xx_set_baud(struct uart_port *port, int baud) div /= prescaler; } - /* Enable enhanced features */ - sc16is7xx_efr_lock(port); - sc16is7xx_port_update(port, SC16IS7XX_EFR_REG, - SC16IS7XX_EFR_ENABLE_BIT, - SC16IS7XX_EFR_ENABLE_BIT); - sc16is7xx_efr_unlock(port); - /* If bit MCR_CLKSEL is set, the divide by 4 prescaler is activated. */ sc16is7xx_port_update(port, SC16IS7XX_MCR_REG, SC16IS7XX_MCR_CLKSEL_BIT, From - Mon Oct 27 07:50:36 2025 X-Mozilla-Status: 0001 X-Mozilla-Status2: 00000000 Return-Path: Delivered-To: hi@josie.lol Received: from witcher.mxrouting.net by witcher.mxrouting.net with LMTP id IKQIH0kk/2iUsTUAYBR5ng (envelope-from ) for ; Mon, 27 Oct 2025 07:50:33 +0000 Return-path: Envelope-to: hi@josie.lol Delivery-date: Mon, 27 Oct 2025 07:50:33 +0000 Received: from dfw.mirrors.kernel.org ([142.0.200.124]) by witcher.mxrouting.net with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.98) (envelope-from ) id 1vDHzs-0000000Esng-2dec for hi@josie.lol; Mon, 27 Oct 2025 07:50:33 +0000 Received: from smtp.subspace.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.mirrors.kernel.org (Postfix) with ESMTPS id 90D874F0D26 for ; Mon, 27 Oct 2025 07:50:11 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D7A8E2E371F; Mon, 27 Oct 2025 07:50:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=yandex-team.ru header.i=@yandex-team.ru header.b="P49fEwis" X-Original-To: stable@vger.kernel.org Received: from forwardcorp1b.mail.yandex.net (forwardcorp1b.mail.yandex.net [178.154.239.136]) (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 4C1402E36E9; Mon, 27 Oct 2025 07:50:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.154.239.136 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761551407; cv=none; b=Lil4JVIteMms4UmwfkeSygN+LDKjCNZMIjq7zaVCd6wepCJzgKzsunOGxBkvGWFi06PfZ/6F+xGE9xDEI1twYmsGUOEjH1R4ikZWcHt+xhWm6jIqa517+oECIXUoAHxDpKnNO1rxStHPWP6KndW5L1L9YtSqHX6vukRUIGpFiVY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761551407; c=relaxed/simple; bh=LoBHsGmeGqpRdc2DqMLx1eBbSSn9xowv31K/JbZQ9D4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=UG1KgAhxtW0OAp6J/30y8oUwq6exzfUE8W1RnWezyfUifatMsPubnNa/Cd877bc9oLz4Ck1qlvOvqiVK8/egju2Dyqsr98DOO7eU4qUDCsjT9QzoYTLjmyhr4IreT7IY3FhledIzAQOFR8zvLnRRom0vd2IHj+a5TxCwtZaJoUM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex-team.ru; spf=pass smtp.mailfrom=yandex-team.ru; dkim=pass (