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 406153D4112; Thu, 15 Jan 2026 17:52:28 +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=1768499548; cv=none; b=de/eaTCnmEIIYxa0O0YNH3784/KOZpp5ce/B+SmL6gwCaPzDgeyNXmCjujVSFV3ZEqTI/CdtWFqPJVrErQWwT36jbMVPYzr3GBP0hZWOFFWKvztfPqVZijpEnjJSZrVj3PAkOkwzukNKqzjU4f2ufcWCGoK57dCX9zAW04ffDm8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768499548; c=relaxed/simple; bh=Z8Fg9pT8SBIr9R8BK0SaeAQWGNKDWIBQTz05M/9o9QY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fYik7eoW736fF21vK18kSVNhPD9OEOjoD5G+/pCsjKZzqIGG8rCdQkrJJ1/ZLg6daDDIZj2Gs3lv74ze9igDBNM8ljoswjaTkPrsGIQsMEIqRydN6t2TJWuzxeNgouHQW4PmDwTBhvno2fj0h5f7goYqbEOUVZmN2TuzviFmRI8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=LpeRKJau; 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="LpeRKJau" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B7E00C116D0; Thu, 15 Jan 2026 17:52:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768499548; bh=Z8Fg9pT8SBIr9R8BK0SaeAQWGNKDWIBQTz05M/9o9QY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LpeRKJauxXWfxq3eVl0CvHmmA0x7rzG/B5PEB8vxTNk+I2aaVeqPkQu1q/EQKlGNO j+b9TMrPaoWHoNk+ElSVpqQPilThRbeYF1Nh4qNH7uCSJ0gIl+hnBYHD/EjdVG0HSY byw15yuS5apFFWe39JR8ccRD9pOg8ZlY+xpNGi5I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold , Thierry Reding Subject: [PATCH 5.10 264/451] amba: tegra-ahb: Fix device leak on SMMU enable Date: Thu, 15 Jan 2026 17:47:45 +0100 Message-ID: <20260115164240.435239228@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164230.864985076@linuxfoundation.org> References: <20260115164230.864985076@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 5.10-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);