From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932286AbcF1Kv6 (ORCPT ); Tue, 28 Jun 2016 06:51:58 -0400 Received: from mail-wm0-f45.google.com ([74.125.82.45]:36654 "EHLO mail-wm0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752742AbcF1Kdd (ORCPT ); Tue, 28 Jun 2016 06:33:33 -0400 From: Daniel Lezcano To: daniel.lezcano@linaro.org, tglx@linutronix.de Cc: linux-kernel@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp Subject: [PATCH 29/92] clocksource/drivers/h8300_timer16: Convert init function to return error Date: Tue, 28 Jun 2016 12:30:48 +0200 Message-Id: <1467109911-11060-29-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1467109911-11060-1-git-send-email-daniel.lezcano@linaro.org> References: <577251A4.7030508@linaro.org> <1467109911-11060-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano --- drivers/clocksource/h8300_timer16.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/clocksource/h8300_timer16.c b/drivers/clocksource/h8300_timer16.c index 75c4407..9d99fc8 100644 --- a/drivers/clocksource/h8300_timer16.c +++ b/drivers/clocksource/h8300_timer16.c @@ -126,7 +126,7 @@ static struct timer16_priv timer16_priv = { #define REG_CH 0 #define REG_COMM 1 -static void __init h8300_16timer_init(struct device_node *node) +static int __init h8300_16timer_init(struct device_node *node) { void __iomem *base[2]; int ret, irq; @@ -136,9 +136,10 @@ static void __init h8300_16timer_init(struct device_node *node) clk = of_clk_get(node, 0); if (IS_ERR(clk)) { pr_err("failed to get clock for clocksource\n"); - return; + return PTR_ERR(clk); } + ret = -ENXIO; base[REG_CH] = of_iomap(node, 0); if (!base[REG_CH]) { pr_err("failed to map registers for clocksource\n"); @@ -151,6 +152,7 @@ static void __init h8300_16timer_init(struct device_node *node) goto unmap_ch; } + ret = -EINVAL; irq = irq_of_parse_and_map(node, 0); if (!irq) { pr_err("failed to get irq for clockevent\n"); @@ -174,7 +176,7 @@ static void __init h8300_16timer_init(struct device_node *node) clocksource_register_hz(&timer16_priv.cs, clk_get_rate(clk) / 8); - return; + return 0; unmap_comm: iounmap(base[REG_COMM]); @@ -182,6 +184,8 @@ unmap_ch: iounmap(base[REG_CH]); free_clk: clk_put(clk); + return ret; } -CLOCKSOURCE_OF_DECLARE(h8300_16bit, "renesas,16bit-timer", h8300_16timer_init); +CLOCKSOURCE_OF_DECLARE_RET(h8300_16bit, "renesas,16bit-timer", + h8300_16timer_init); -- 1.9.1