From patchwork Tue Jul 12 03:00:14 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Levin X-Patchwork-Id: 71774 Delivered-To: patch@linaro.org Received: by 10.140.29.52 with SMTP id a49csp244582qga; Mon, 11 Jul 2016 20:04:52 -0700 (PDT) X-Received: by 10.66.139.230 with SMTP id rb6mr41071764pab.101.1468292667367; Mon, 11 Jul 2016 20:04:27 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id b5si1186731paf.28.2016.07.11.20.04.27; Mon, 11 Jul 2016 20:04:27 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030650AbcGLDET (ORCPT + 3 others); Mon, 11 Jul 2016 23:04:19 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:50883 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030611AbcGLDEP (ORCPT ); Mon, 11 Jul 2016 23:04:15 -0400 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u6C346qG024975 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 12 Jul 2016 03:04:06 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u6C345Ae001958 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 12 Jul 2016 03:04:06 GMT Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserv0121.oracle.com (8.13.8/8.13.8) with ESMTP id u6C345eL010191; Tue, 12 Jul 2016 03:04:05 GMT Received: from lappy.us.oracle.com (/10.154.100.236) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 11 Jul 2016 20:04:04 -0700 From: Sasha Levin To: stable@vger.kernel.org, stable-commits@vger.kernel.org Cc: Linus Walleij , Michael Turquette , Pawel Moll , Stephen Boyd , Sasha Levin Subject: [added to the 3.18 stable tree] clk: versatile: sp810: support reentrance Date: Mon, 11 Jul 2016 23:00:14 -0400 Message-Id: <1468292479-23684-162-git-send-email-sasha.levin@oracle.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1468292479-23684-1-git-send-email-sasha.levin@oracle.com> References: <1468292479-23684-1-git-send-email-sasha.levin@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Linus Walleij This patch has been added to the 3.18 stable tree. If you have any objections, please let us know. -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html =============== [ Upstream commit ec7957a6aa0aaf981fb8356dc47a2cdd01cde03c ] Despite care take to allocate clocks state containers the SP810 driver actually just supports creating one instance: all clocks registered for every instance will end up with the exact same name and __clk_init() will fail. Rename the timclken<0> .. timclken to sp810__ so every clock on every instance gets a unique name. This is necessary for the RealView PBA8 which has two SP810 blocks: the second block will not register its clocks unless every clock on every instance is unique and results in boot logs like this: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at ../drivers/clk/versatile/clk-sp810.c:137 clk_sp810_of_setup+0x110/0x154() Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc2-00030-g352718fc39f6-dirty #225 Hardware name: ARM RealView Machine (Device Tree Support) [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [] (show_stack) from [] (dump_stack+0x84/0x9c) [] (dump_stack) from [] (warn_slowpath_common+0x74/0xb0) [] (warn_slowpath_common) from [] (warn_slowpath_null+0x1c/0x24) [] (warn_slowpath_null) from [] (clk_sp810_of_setup+0x110/0x154) [] (clk_sp810_of_setup) from [] (of_clk_init+0x12c/0x1c8) [] (of_clk_init) from [] (time_init+0x20/0x2c) [] (time_init) from [] (start_kernel+0x244/0x3c4) [] (start_kernel) from [<7000807c>] (0x7000807c) ---[ end trace cb88537fdc8fa200 ]--- Cc: Michael Turquette Cc: Pawel Moll Fixes: 6e973d2c4385 "clk: vexpress: Add separate SP810 driver" Signed-off-by: Linus Walleij Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/versatile/clk-sp810.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/clk/versatile/clk-sp810.c b/drivers/clk/versatile/clk-sp810.c index 5122ef2..e63c3ef 100644 --- a/drivers/clk/versatile/clk-sp810.c +++ b/drivers/clk/versatile/clk-sp810.c @@ -141,6 +141,7 @@ void __init clk_sp810_of_setup(struct device_node *node) const char *parent_names[2]; char name[12]; struct clk_init_data init; + static int instance; int i; if (!sp810) { @@ -172,7 +173,7 @@ void __init clk_sp810_of_setup(struct device_node *node) init.num_parents = ARRAY_SIZE(parent_names); for (i = 0; i < ARRAY_SIZE(sp810->timerclken); i++) { - snprintf(name, ARRAY_SIZE(name), "timerclken%d", i); + snprintf(name, sizeof(name), "sp810_%d_%d", instance, i); sp810->timerclken[i].sp810 = sp810; sp810->timerclken[i].channel = i; @@ -184,5 +185,6 @@ void __init clk_sp810_of_setup(struct device_node *node) } of_clk_add_provider(node, clk_sp810_timerclken_of_get, sp810); + instance++; } CLK_OF_DECLARE(sp810, "arm,sp810", clk_sp810_of_setup);