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 614CE320CB6; Fri, 9 Jan 2026 12:11:29 +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=1767960689; cv=none; b=bnDDO52KcodzPQ8IbE3TScQ7Ls48rZw3b2Q42iMqsHzhZj9PeUBMVmRycu75HKgXQURLHOvOqI32cDs04JC2hpcr2tRgZSzC/sD4qh9lGj7rXaVjDkM/FJOHOw6iz/V7yQuRjL7gt6vr+p1Fnj1sMbSJa2iOxdfRlONoHjNhmaU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767960689; c=relaxed/simple; bh=0HZyDWBVImTyYIC2pkrktRG3lk97Tr5K8FHn/MnitYE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pRQjBH+rPteFsAerxQ6JswsJUVLRCn5a6X4YkBd4mZY9gjDnktrCi1D9W2YtjIRErcqUMI5dIELcyMnc4/J2ZkmZXkoPk4d6aODLAARQ9Lj9I/qezequG8BJHhQiNZryQ1JjikSZtu4mBxNkgm11yP0jJTBjBXcApxdoWYk5STA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XSvccAs5; 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="XSvccAs5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92C48C4CEF1; Fri, 9 Jan 2026 12:11:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767960688; bh=0HZyDWBVImTyYIC2pkrktRG3lk97Tr5K8FHn/MnitYE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XSvccAs5So4qZEoroNS40DezewvMO5dkS48uZGg1d6Zkjezfrq20pGOtXx+ILIJFX WtAM3WD2x0/ZV7kPgapSGAA0ZTInKpi/N299Amq0pltd7gPoR7i4VG1rNHKHWzPp+8 Y4gPKM4VCChhqyHQRah6EvtLiX5tAUOa6+HrBz/g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold , Thierry Reding Subject: [PATCH 6.6 489/737] amba: tegra-ahb: Fix device leak on SMMU enable Date: Fri, 9 Jan 2026 12:40:28 +0100 Message-ID: <20260109112152.384488254@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112133.973195406@linuxfoundation.org> References: <20260109112133.973195406@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 6.6-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);