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 2E81E2D060B; Tue, 26 Aug 2025 13:43:17 +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=1756215797; cv=none; b=cE6bMHe8OvZqOcML2Q+sO0nL1zrZgWaCbYbYS7Ubl1yucE+8EjmY1GV9TJcESEUV4GqZUfWPpYGquZe+scOanfF6ZOUoR+bJZ6Bcr6PQEwnGbuKtFM+ymxjKLHCwjXjl/ymaCpAoPR1gbr77kyB9HPd/ZuWn65HpjWU26dC6Zik= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756215797; c=relaxed/simple; bh=ZUUsUk3gCWv+otGHx0gjq+jzDBf9zdZCJwb5cRz4EGY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GAQhh+XhzFhAPP/n4WE/7u/Un+5o5Z+IXq5Ylp7psobFyoUAzYvA6WNGgyffN+CGuGNa7uK75sCr9wxTTdjTD5PNrz4Hz3IvPFfmSuZR6UfKLhW8t3XhNa5vuvbJZ+Y7nQ5j9fxvgiMP8lyXF+ucruOnKxaez7Sn1Lqoc/JZqLU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=05t6tgqw; 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="05t6tgqw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC0B6C4CEF1; Tue, 26 Aug 2025 13:43:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756215797; bh=ZUUsUk3gCWv+otGHx0gjq+jzDBf9zdZCJwb5cRz4EGY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=05t6tgqwmVhHNh8DZDMpnqZvjU2nVO9RyDbHM3h9X2at1RG3ZyWQ56qVz4PkZjcyc KRqFStWoIiKlgfHTNveQv48/yJIAhXX+CFlBQNU0Gl1SxU5rYRWYVV3Qiv4B4BRbq+ 98ChAQAfKotApeZArgJAVYcu/Rg5ckFuIntt8McQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Rohit Visavalia , Stephen Boyd , Sasha Levin Subject: [PATCH 5.15 170/644] clk: xilinx: vcu: unregister pll_post only if registered correctly Date: Tue, 26 Aug 2025 13:04:21 +0200 Message-ID: <20250826110950.689255815@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Rohit Visavalia [ Upstream commit 3b0abc443ac22f7d4f61ddbbbbc5dbb06c87139d ] If registration of pll_post is failed, it will be set to NULL or ERR, unregistering same will fail with following call trace: Unable to handle kernel NULL pointer dereference at virtual address 008 pc : clk_hw_unregister+0xc/0x20 lr : clk_hw_unregister_fixed_factor+0x18/0x30 sp : ffff800011923850 ... Call trace: clk_hw_unregister+0xc/0x20 clk_hw_unregister_fixed_factor+0x18/0x30 xvcu_unregister_clock_provider+0xcc/0xf4 [xlnx_vcu] xvcu_probe+0x2bc/0x53c [xlnx_vcu] Fixes: 4472e1849db7 ("soc: xilinx: vcu: make pll post divider explicit") Signed-off-by: Rohit Visavalia Link: https://lore.kernel.org/r/20250210113614.4149050-2-rohit.visavalia@amd.com Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/xilinx/xlnx_vcu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clk/xilinx/xlnx_vcu.c b/drivers/clk/xilinx/xlnx_vcu.c index d66b1315114e..292d50ba0112 100644 --- a/drivers/clk/xilinx/xlnx_vcu.c +++ b/drivers/clk/xilinx/xlnx_vcu.c @@ -587,8 +587,8 @@ static void xvcu_unregister_clock_provider(struct xvcu_device *xvcu) xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_ENC_MCU]); if (!IS_ERR_OR_NULL(hws[CLK_XVCU_ENC_CORE])) xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_ENC_CORE]); - - clk_hw_unregister_fixed_factor(xvcu->pll_post); + if (!IS_ERR_OR_NULL(xvcu->pll_post)) + clk_hw_unregister_fixed_factor(xvcu->pll_post); } /** -- 2.39.5