From: patrice.chotard@st•com (Patrice Chotard)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH V2 08/63] clocksource/drivers/st_lpc: Convert init function to return error
Date: Mon, 20 Jun 2016 09:39:31 +0200 [thread overview]
Message-ID: <57679DB2.4040102@st.com> (raw)
In-Reply-To: <1466112442-31105-9-git-send-email-daniel.lezcano@linaro.org>
Hi Daniel
On 06/16/2016 11:26 PM, Daniel Lezcano wrote:
> 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 <daniel.lezcano@linaro•org>
> ---
> drivers/clocksource/clksrc_st_lpc.c | 22 +++++++++++++---------
> 1 file changed, 13 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> index 65ec467..c9022a9 100644
> --- a/drivers/clocksource/clksrc_st_lpc.c
> +++ b/drivers/clocksource/clksrc_st_lpc.c
> @@ -92,7 +92,7 @@ static int __init st_clksrc_setup_clk(struct device_node *np)
> return 0;
> }
>
> -static void __init st_clksrc_of_register(struct device_node *np)
> +static int __init st_clksrc_of_register(struct device_node *np)
> {
> int ret;
> uint32_t mode;
> @@ -100,32 +100,36 @@ static void __init st_clksrc_of_register(struct device_node *np)
> ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> if (ret) {
> pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> - return;
> + return ret;
> }
>
> /* LPC can either run as a Clocksource or in RTC or WDT mode */
> if (mode != ST_LPC_MODE_CLKSRC)
> - return;
> + return 0;
>
> ddata.base = of_iomap(np, 0);
> if (!ddata.base) {
> pr_err("clksrc-st-lpc: Unable to map iomem\n");
> - return;
> + return -ENXIO;
> }
>
> - if (st_clksrc_setup_clk(np)) {
> + ret = st_clksrc_setup_clk(np);
> + if (ret) {
> iounmap(ddata.base);
> - return;
> + return ret;
> }
>
> - if (st_clksrc_init()) {
> + ret = st_clksrc_init();
> + if (ret) {
> clk_disable_unprepare(ddata.clk);
> clk_put(ddata.clk);
> iounmap(ddata.base);
> - return;
> + return ret;
> }
>
> pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> clk_get_rate(ddata.clk));
> +
> + return ret;
> }
> -CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
> +CLOCKSOURCE_OF_DECLARE_RET(ddata, "st,stih407-lpc", st_clksrc_of_register);
Acked-by: Patrice Chotard <patrice.chotard@st•com>
next prev parent reply other threads:[~2016-06-20 7:39 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1466112442-31105-1-git-send-email-daniel.lezcano@linaro.org>
2016-06-16 21:26 ` [PATCH V2 03/63] clocksource/drivers/rockchip_timer: Convert init function to return error Daniel Lezcano
2016-06-18 10:38 ` Heiko Stübner
2016-06-18 12:54 ` [PATCH V3] " Daniel Lezcano
2016-06-18 13:47 ` Heiko Stübner
2016-06-16 21:26 ` [PATCH V2 04/63] clocksource/drivers/mkt_timer: " Daniel Lezcano
2016-06-17 16:16 ` Matthias Brugger
2016-06-16 21:26 ` [PATCH V2 05/63] clocksource/drivers/exynos_mct: " Daniel Lezcano
2016-06-16 21:26 ` [PATCH V2 07/63] clocksource/drivers/cadence_ttc: " Daniel Lezcano
2016-06-16 21:43 ` Sören Brinkmann
2016-06-16 21:26 ` [PATCH V2 08/63] clocksource/drivers/st_lpc: " Daniel Lezcano
2016-06-20 7:39 ` Patrice Chotard [this message]
2016-06-20 11:33 ` Maxime Coquelin
2016-06-16 21:26 ` [PATCH V2 10/63] clocksource/drivers/clps711x: " Daniel Lezcano
2016-06-16 21:26 ` [PATCH V2 11/63] clocksource/drivers/digitcolor: " Daniel Lezcano
2016-06-17 3:15 ` Baruch Siach
2016-06-16 21:26 ` [PATCH V2 12/63] clocksource/drivers/armv7m_systick: " Daniel Lezcano
2016-06-20 11:31 ` Maxime Coquelin
2016-06-16 21:26 ` [PATCH V2 13/63] clocksource/drivers/bcm2835_timer: " Daniel Lezcano
2016-06-26 3:10 ` Eric Anholt
2016-06-16 21:26 ` [PATCH V2 15/63] clocksource/drivers/clksrc-dbx500: " Daniel Lezcano
2016-06-17 16:10 ` Linus Walleij
2016-06-16 21:26 ` [PATCH V2 18/63] clocksource/drivers/arm_global_timer: " Daniel Lezcano
2016-06-20 11:32 ` Maxime Coquelin
2016-06-16 21:26 ` [PATCH V2 22/63] clocksource/drivers/mips-gic-timer: " Daniel Lezcano
2016-06-16 21:26 ` [PATCH V2 25/63] clocksource/drivers/mxs_timer: " Daniel Lezcano
2016-06-17 6:33 ` Uwe Kleine-König
2016-06-20 9:15 ` Liviu Dudau
2016-06-20 9:24 ` Daniel Lezcano
2016-06-20 9:26 ` [PATCH V3] clocksource/drivers/mps2-timer: " Daniel Lezcano
2016-06-20 9:42 ` liviu.dudau at arm.com
2016-06-16 21:26 ` [PATCH V2 31/63] clocksource/drivers/tango_xtal: " Daniel Lezcano
2016-06-16 21:26 ` [PATCH V2 35/63] clocksource/drivers/time-lpc32xx: " Daniel Lezcano
2016-06-17 6:52 ` Uwe Kleine-König
2016-06-17 8:44 ` [PATCH V3] clocksource/drivers/time-efm32: " Daniel Lezcano
2016-06-17 9:46 ` Uwe Kleine-König
2016-06-16 21:26 ` [PATCH V2 36/63] clocksource/drivers/time-orion: " Daniel Lezcano
2016-06-20 17:08 ` Sylvain Lemieux
2016-06-16 21:26 ` [PATCH V2 39/63] clocksource/drivers/timer-atlas7: " Daniel Lezcano
2016-06-16 21:27 ` [PATCH V2 42/63] clocksource/drivers/prima2: " Daniel Lezcano
2016-06-16 21:27 ` [PATCH V2 45/63] clocksource/drivers/timer-keystone: " Daniel Lezcano
2016-06-17 16:03 ` Santosh Shilimkar
2016-06-16 21:27 ` [PATCH V2 47/63] clocksource/drivers/timer-stm32: " Daniel Lezcano
2016-06-20 11:32 ` Maxime Coquelin
2016-06-16 21:27 ` [PATCH V2 48/63] clocksource/drivers/timer-sun5i: " Daniel Lezcano
2016-06-16 21:27 ` [PATCH V2 50/63] clocksource/drivers/timer-u300: " Daniel Lezcano
2016-06-17 16:11 ` Linus Walleij
2016-06-16 21:27 ` [PATCH V2 51/63] clocksource/drivers/versatile: " Daniel Lezcano
2016-06-20 9:13 ` Liviu Dudau
2016-06-16 21:27 ` [PATCH V2 53/63] clocksource/drivers/vt8500_timer: " Daniel Lezcano
2016-06-16 21:27 ` [PATCH V2 59/63] clocksource/drivers/smp_twd: " Daniel Lezcano
2016-06-16 21:27 ` [PATCH V2 62/63] clocksource/drivers/oxnas-rps: " Daniel Lezcano
2016-06-17 6:58 ` Neil Armstrong
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