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[78.210.255.2]) by smtp.gmail.com with ESMTPSA id x128sm16705606wmf.6.2016.06.16.14.29.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 16 Jun 2016 14:29:07 -0700 (PDT) From: Daniel Lezcano To: daniel.lezcano@linaro.org, tglx@linutronix.de Cc: linux-kernel@vger.kernel.org Subject: [PATCH V2 49/63] clocksource/drivers/timer-ti-32k: Convert init function to return error Date: Thu, 16 Jun 2016 23:27:08 +0200 Message-Id: <1466112442-31105-50-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1466112442-31105-1-git-send-email-daniel.lezcano@linaro.org> References: <1466112442-31105-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk 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/timer-ti-32k.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) -- 1.9.1 diff --git a/drivers/clocksource/timer-ti-32k.c b/drivers/clocksource/timer-ti-32k.c index 8518d9d..e4ad3c6e 100644 --- a/drivers/clocksource/timer-ti-32k.c +++ b/drivers/clocksource/timer-ti-32k.c @@ -88,14 +88,14 @@ static u64 notrace omap_32k_read_sched_clock(void) return ti_32k_read_cycles(&ti_32k_timer.cs); } -static void __init ti_32k_timer_init(struct device_node *np) +static int __init ti_32k_timer_init(struct device_node *np) { int ret; ti_32k_timer.base = of_iomap(np, 0); if (!ti_32k_timer.base) { pr_err("Can't ioremap 32k timer base\n"); - return; + return -ENXIO; } ti_32k_timer.counter = ti_32k_timer.base; @@ -116,11 +116,13 @@ static void __init ti_32k_timer_init(struct device_node *np) ret = clocksource_register_hz(&ti_32k_timer.cs, 32768); if (ret) { pr_err("32k_counter: can't register clocksource\n"); - return; + return ret; } sched_clock_register(omap_32k_read_sched_clock, 32, 32768); pr_info("OMAP clocksource: 32k_counter at 32768 Hz\n"); + + return 0; } -CLOCKSOURCE_OF_DECLARE(ti_32k_timer, "ti,omap-counter32k", +CLOCKSOURCE_OF_DECLARE_RET(ti_32k_timer, "ti,omap-counter32k", ti_32k_timer_init);