From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 538DEEB64DD for ; Wed, 9 Aug 2023 11:47:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234332AbjHILrO (ORCPT ); Wed, 9 Aug 2023 07:47:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234430AbjHILrL (ORCPT ); Wed, 9 Aug 2023 07:47:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED3C6A3; Wed, 9 Aug 2023 04:47:10 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8C001635E0; Wed, 9 Aug 2023 11:47:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69245C433C7; Wed, 9 Aug 2023 11:47:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691581629; bh=lohgGqt9f2tUPYle/xT621t+yaAN9xs1oy9vV4vCGRA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Vog3WRhdXumFnAR+KFsnwyGeIMxN5+E7lypn/T01zHm9ddnLKKeHPaBJ5J9sg7nU/ eM1+nB51+ZsIE1O2VPAOazLz/zDgnwbwFPh0jg4LnKaI4+UwNrMd+aoF4if4k2SDU2 /+7w8VDP9SVLQFafunMckDjrQVYifRNM5A6Vurt4= Date: Wed, 9 Aug 2023 13:47:07 +0200 From: Greg KH To: 240401736@qq.com Cc: andriy.shevchenko@linux.intel.com, ilpo.jarvinen@linux.intel.com, jirislaby@kernel.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, ??? , ??? , ??? , colorsu1922@gmail.com Subject: Re: [PATCH v2] serial: 8250: Preserve original value of DLF register Message-ID: <2023080954-everyday-galore-f520@gregkh> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org On Wed, Aug 09, 2023 at 02:30:58PM +0800, 240401736@qq.com wrote: > On Thu, 29 Jun 2023 20:35:30 +0800, ruihongluo wrote: > > This commit is aimed at preserving the original value of the > > DLF(Divisor Latch Fraction Register). When the DLF register is > > modified without preservation, it can disrupt the baudrate settings > > established by firmware or bootloader , leading to data corruption > > and the generation of unreadable or distorted characters. > > > > Fixes: 701c5e73b296 ("serial: 8250_dw: add fractional divisor support") > > Signed-off-by: Ruihong Luo > > Will this patch be merged into the 5.15 branch? We also need this patch on > the 5.15 branch. What is the git commit id of it in Linus's tree? thanks, greg k-h