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 714C12673AA; Sun, 1 Mar 2026 01:54:55 +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=1772330095; cv=none; b=qt2qpw21RlLFjKWzK3lhDd0Epa9bL9P7pE8poaV2E/zqmBPntvFax9PjYGI6yYBUcZmkoZIv5NN1xXM6Ejy8xXhOjwPHVgm9p5Yf9A82tCiFYgJtfEUERf/EEP5y3oym2Y94t485RPvXl27uRKubcJ0uQK2Ip566oUyDGQ3P/WQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772330095; c=relaxed/simple; bh=I2HPxVqL/24mv875Z8LhKLtcrUl4X1yyrzU0DBGKjH4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=hNbtbWCsc7sCi/6LK0K0PD1Hm0LVmuoyDYvjL+xpYFocttIz8JOJN45PC7zclEzRNHPLXxvEssduXwoyGpdTZ3f7NtjqVhh1kUatbFgjTwKoqAuyVz7X3AWl1NgXdXtmPwoyAG0wXEV1b3Mi+rKQrIPpCIhGbj7mXHpbmj7kDg4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FteGoBYC; 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="FteGoBYC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C5A0BC19421; Sun, 1 Mar 2026 01:54:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772330095; bh=I2HPxVqL/24mv875Z8LhKLtcrUl4X1yyrzU0DBGKjH4=; h=From:To:Cc:Subject:Date:From; b=FteGoBYC0xdJ9sECy4dBPsHYJqMkVqsmynqoGytaqFYLyvF9hu9yLh2wCsU1sz9T3 DwyQCHQJ/3PO3TT90Dn2GUtPmqneHCYsotn3jOw4M2l/Ez7e+/kIFI7cmIi9et5zlj 1vr+LgqZMNi7VTZQCrSf/HhhYLxrlVZEnU6mgQAc1+cjCfe5jbdFjukkuHHFmoUduV QSxABJywyDEruvCCfPpPaijm07dpgRxDLq2w8HZPht2Ayt+dmivE8ogMkaMsf4OrvG 1ZLkWj0KkFF5GYydpKl83WSRzeJO9xk68Ay+hWuonEW0ZJtAts2GeOg8cpZ20HGit7 tUVMBvNa9wg4A== From: Sasha Levin To: stable@vger.kernel.org, jiaxun.yang@flygoat.com Cc: Waldemar Brodkorb , Thomas Bogendoerfer , linux-mips@vger.kernel.org Subject: FAILED: Patch "MIPS: rb532: Fix MMIO UART resource registration" failed to apply to 5.15-stable tree Date: Sat, 28 Feb 2026 20:54:53 -0500 Message-ID: <20260301015453.1721961-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Hint: ignore X-stable: review Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-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 . Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From e93bb4b76cfefb302534246e892c7667491cb8cc Mon Sep 17 00:00:00 2001 From: Jiaxun Yang Date: Thu, 5 Feb 2026 10:08:42 +0000 Subject: [PATCH] MIPS: rb532: Fix MMIO UART resource registration Since commit 6e690d54cfa8 ("serial: 8250: fix return error code in serial8250_request_std_resource()"), registering an 8250 MMIO port without mapbase no longer works, as the resource range is derived from mapbase/mapsize. Populate mapbase and mapsize accordingly. Also drop ugly membase KSEG1 pointer and set UPF_IOREMAP instead, letting the 8250 core perform the ioremap. Fixes: 6e690d54cfa8 ("serial: 8250: fix return error code in serial8250_request_std_resource()") Cc: stable@vger.kernel.org Reported-by: Waldemar Brodkorb Link: https://lore.kernel.org/linux-mips/aX-d0ShTplHKZT33@waldemar-brodkorb.de/ Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer --- arch/mips/rb532/devices.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/mips/rb532/devices.c b/arch/mips/rb532/devices.c index b7f6f782d9a13..ffa4d38ca95df 100644 --- a/arch/mips/rb532/devices.c +++ b/arch/mips/rb532/devices.c @@ -212,11 +212,12 @@ static struct platform_device rb532_wdt = { static struct plat_serial8250_port rb532_uart_res[] = { { .type = PORT_16550A, - .membase = (char *)KSEG1ADDR(REGBASE + UART0BASE), + .mapbase = REGBASE + UART0BASE, + .mapsize = 0x1000, .irq = UART0_IRQ, .regshift = 2, .iotype = UPIO_MEM, - .flags = UPF_BOOT_AUTOCONF, + .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP, }, { .flags = 0, -- 2.51.0