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 B1A602C17A0; Wed, 25 Feb 2026 06:57:02 +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=1772002622; cv=none; b=sh2/EquTWNW5LZbj/MxNDob+ilXT/SrB5roNM+P6FADm62GLJLe27xoE75GdAKRCEWwW8tTi87oLusUvScg7QQbnV/5Doxf+CtZy3URIWMSF9/JIJVqqf6cs6GGiU5RDZNbkLo/QCNey++s1Fk9tKEcn4OFwuJi4Y9ieON/CnPQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772002622; c=relaxed/simple; bh=Xt0uAy74UXVRM5MlNTebLsja9bjjXjJosQad7Gii7T4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=QpYlXyd96C5oVMz3qdTUJii+/9BNZijRkw8ZSCtTxNdobQLpyZecWD8YAFT8TjeabmMmoIodmfw1jWYCvJAv9SFXtiJh33wlOltL5iCgMZLItUSWcDxh02fk/Alzifpz7lsRaCsqCHLt3Q/n3bXnuyunkgJlFFrVwhHIeWD8SnA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rOHKOC2l; 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="rOHKOC2l" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80298C19425; Wed, 25 Feb 2026 06:57:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1772002622; bh=Xt0uAy74UXVRM5MlNTebLsja9bjjXjJosQad7Gii7T4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rOHKOC2lO6UyZ7G02JLTKmiLjHWqWX+F315GvDQ27dx2RLGgjKeMd30hJLRfb8VyZ 1XQtJ2WRnGOR7uW1Rtxx6jfNr5GXRLic7dMVeJ68YsRyLXdw04cKjxc8OGXzmNTOxs ipaGniQ3mKf7ByDC6QoXxJzwJouPKTM4Vpshe7IM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Ren=C3=A9=20Rebe?= , Sean Anderson , Paolo Abeni , Sasha Levin Subject: [PATCH 6.18 327/641] net: sunhme: Fix sbus regression Date: Tue, 24 Feb 2026 17:20:53 -0800 Message-ID: <20260225012356.617609965@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225012348.915798704@linuxfoundation.org> References: <20260225012348.915798704@linuxfoundation.org> User-Agent: quilt/0.69 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: René Rebe [ Upstream commit 8c5d17834ec104d0abd1bda52fbc04e647fab274 ] Commit cc216e4b44ce ("net: sunhme: Switch SBUS to devres") changed explicit sized of_ioremap with BMAC_REG_SIZEs to devm_platform_ioremap_resource mapping all the resource. However, this does not work on my Sun Ultra 2 with SBUS HMEs: hme f0072f38: error -EBUSY: can't request region for resource [mem 0x1ffe8c07000-0x1ffe8c0701f] hme f0072f38: Cannot map TCVR registers. hme f0072f38: probe with driver hme failed with error -16 hme f007ab44: error -EBUSY: can't request region for resource [mem 0x1ff28c07000-0x1ff28c0701f] hme f007ab44: Cannot map TCVR registers. hme f007ab44: probe with driver hme failed with error -16 Turns out the open-firmware resources overlap, at least on this machines and PROM version: hexdump /proc/device-tree/sbus@1f,0/SUNW,hme@2,8c00000/reg: 00 00 00 02 08 c0 00 00 00 00 01 08 00 00 00 02 08 c0 20 00 00 00 20 00 00 00 00 02 08 c0 40 00 00 00 20 00 00 00 00 02 08 c0 60 00 00 00 20 00 00 00 00 02 08 c0 70 00 00 00 00 20 And the driver previously explicitly mapped way smaller mmio regions: /proc/iomem: 1ff28c00000-1ff28c00107 : HME Global Regs 1ff28c02000-1ff28c02033 : HME TX Regs 1ff28c04000-1ff28c0401f : HME RX Regs 1ff28c06000-1ff28c0635f : HME BIGMAC Regs 1ff28c07000-1ff28c0701f : HME Tranceiver Regs Quirk this specific issue by truncating the previous resource to not overlap into the TCVR registers. Fixes: cc216e4b44ce ("net: sunhme: Switch SBUS to devres") Signed-off-by: René Rebe Reviewed-by: Sean Anderson Link: https://patch.msgid.link/20260205.170959.89574674688839340.rene@exactco.de Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/ethernet/sun/sunhme.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c index 48f0a96c0e9e3..6669980829980 100644 --- a/drivers/net/ethernet/sun/sunhme.c +++ b/drivers/net/ethernet/sun/sunhme.c @@ -2551,6 +2551,9 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe) goto err_out_clear_quattro; } + /* BIGMAC may have bogus sizes */ + if ((op->resource[3].end - op->resource[3].start) >= BMAC_REG_SIZE) + op->resource[3].end = op->resource[3].start + BMAC_REG_SIZE - 1; hp->bigmacregs = devm_platform_ioremap_resource(op, 3); if (IS_ERR(hp->bigmacregs)) { dev_err(&op->dev, "Cannot map BIGMAC registers.\n"); -- 2.51.0