From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr710107.outbound.protection.outlook.com ([40.107.71.107]:21288 "EHLO NAM05-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726922AbeIGFON (ORCPT ); Fri, 7 Sep 2018 01:14:13 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Rajan Vaja , Stephen Boyd , Sasha Levin Subject: [PATCH AUTOSEL 4.18 21/88] clk: clk-fixed-factor: Clear OF_POPULATED flag in case of failure Date: Fri, 7 Sep 2018 00:36:07 +0000 Message-ID: <20180907003547.57567-21-alexander.levin@microsoft.com> References: <20180907003547.57567-1-alexander.levin@microsoft.com> In-Reply-To: <20180907003547.57567-1-alexander.levin@microsoft.com> Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: From: Rajan Vaja [ Upstream commit f6dab4233d6b64d719109040503b567f71fbfa01 ] Fixed factor clock has two initializations at of_clk_init() time and during platform driver probe. Before of_clk_init() call, node is marked as populated and so its probe never gets called. During of_clk_init() fixed factor clock registration may fail if any of its parent clock is not registered. In this case, it doesn't get chance to retry registration from probe. Clear OF_POPULATED flag if fixed factor clock registration fails so that clock registration is attempted again from probe. Signed-off-by: Rajan Vaja Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/clk-fixed-factor.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.= c index a5d402de5584..20724abd38bd 100644 --- a/drivers/clk/clk-fixed-factor.c +++ b/drivers/clk/clk-fixed-factor.c @@ -177,8 +177,15 @@ static struct clk *_of_fixed_factor_clk_setup(struct d= evice_node *node) =20 clk =3D clk_register_fixed_factor(NULL, clk_name, parent_name, flags, mult, div); - if (IS_ERR(clk)) + if (IS_ERR(clk)) { + /* + * If parent clock is not registered, registration would fail. + * Clear OF_POPULATED flag so that clock registration can be + * attempted again from probe function. + */ + of_node_clear_flag(node, OF_POPULATED); return clk; + } =20 ret =3D of_clk_add_provider(node, of_clk_src_simple_get, clk); if (ret) { --=20 2.17.1