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 DB30F3559C0; Tue, 6 Jan 2026 17:29:24 +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=1767720564; cv=none; b=jquCFhhdI6MAqDA6mpcU2+mnpn7ABJI2X6i3FdDdIW/aXXZc6Piu3VkbVqI+u0jGcbVqc5gEHtrebzKsqW2iJe1KqpRi2bmDRsPgcLbfUuXB6kKsrbdZK/Yk50XhHS9NQKqRfvOl+S4Ils8uUAi67rSuLFl5DeL7DwHuwOaoA34= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767720564; c=relaxed/simple; bh=F7VdJXcNIbIl1mfo/wYoUtwF6krQOhTn7Crifgbl+i4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QmlkMAzBtSDYxT61sX/A/3QO4fCR6+UXeFUqyWFnO1E8CFaGKL+wWu9nU5UyWKP8NjDDQONOcMXMBnYWxnxmqDzOfZzt96IHkrrxT0PMhCjzi1zwDLjaTAnk/EK9dZPaOEeXadQBTEGMjGx4LxmGBsX//ET+aECOZd6K767ye30= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=BYh93WnT; 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="BYh93WnT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4AEEDC116C6; Tue, 6 Jan 2026 17:29:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767720564; bh=F7VdJXcNIbIl1mfo/wYoUtwF6krQOhTn7Crifgbl+i4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BYh93WnTYRyCVFGGjMZN5XvFbROXgBQioYLAaVSeUTxMuqDq0HuY+KKIpeyvRfvn2 yRe2CwukUOX2hgORWfajEL/VOt/2yeNXLHDQ9ghIPUuauIrJc6YHZ6P/WPhK5Ttgov G7+bXWcaDS1p6Jw84fWOK9GnRM6gYalVvo6ivbXI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold , Thierry Reding Subject: [PATCH 6.12 274/567] amba: tegra-ahb: Fix device leak on SMMU enable Date: Tue, 6 Jan 2026 18:00:56 +0100 Message-ID: <20260106170501.462205895@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260106170451.332875001@linuxfoundation.org> References: <20260106170451.332875001@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-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit 500e1368e46928f4b2259612dcabb6999afae2a6 upstream. Make sure to drop the reference taken to the AHB platform device when looking up its driver data while enabling the SMMU. Note that holding a reference to a device does not prevent its driver data from going away. Fixes: 89c788bab1f0 ("ARM: tegra: Add SMMU enabler in AHB") Cc: stable@vger.kernel.org # 3.5 Signed-off-by: Johan Hovold Signed-off-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman --- drivers/amba/tegra-ahb.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/amba/tegra-ahb.c +++ b/drivers/amba/tegra-ahb.c @@ -144,6 +144,7 @@ int tegra_ahb_enable_smmu(struct device_ if (!dev) return -EPROBE_DEFER; ahb = dev_get_drvdata(dev); + put_device(dev); val = gizmo_readl(ahb, AHB_ARBITRATION_XBAR_CTRL); val |= AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE; gizmo_writel(ahb, val, AHB_ARBITRATION_XBAR_CTRL);