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author | Daniel Lezcano <daniel.lezcano@linaro.org> | 2016-06-06 17:58:15 +0200 |
---|---|---|
committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2016-06-28 10:19:25 +0200 |
commit | e46105aff5e53b27844541ebe0de5089268c6692 (patch) | |
tree | 170dbc4e1b33e90cc31a409cfd8c9f5e346b6d57 | |
parent | e1d2b9f024c519788c044ee6a5f694d69973791e (diff) | |
download | linux-stable-e46105aff5e53b27844541ebe0de5089268c6692.tar.gz linux-stable-e46105aff5e53b27844541ebe0de5089268c6692.tar.bz2 linux-stable-e46105aff5e53b27844541ebe0de5089268c6692.zip |
clocksource/drivers/nomadik-mtu: Convert init function to return error
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>
-rw-r--r-- | drivers/clocksource/nomadik-mtu.c | 45 |
1 files changed, 29 insertions, 16 deletions
diff --git a/drivers/clocksource/nomadik-mtu.c b/drivers/clocksource/nomadik-mtu.c index bc8dd443c727..d2be5b3e0318 100644 --- a/drivers/clocksource/nomadik-mtu.c +++ b/drivers/clocksource/nomadik-mtu.c @@ -193,10 +193,11 @@ static struct irqaction nmdk_timer_irq = { .dev_id = &nmdk_clkevt, }; -static void __init nmdk_timer_init(void __iomem *base, int irq, +static int __init nmdk_timer_init(void __iomem *base, int irq, struct clk *pclk, struct clk *clk) { unsigned long rate; + int ret; mtu_base = base; @@ -226,10 +227,12 @@ static void __init nmdk_timer_init(void __iomem *base, int irq, /* Timer 0 is the free running clocksource */ nmdk_clksrc_reset(); - if (clocksource_mmio_init(mtu_base + MTU_VAL(0), "mtu_0", - rate, 200, 32, clocksource_mmio_readl_down)) - pr_err("timer: failed to initialize clock source %s\n", - "mtu_0"); + ret = clocksource_mmio_init(mtu_base + MTU_VAL(0), "mtu_0", + rate, 200, 32, clocksource_mmio_readl_down); + if (ret) { + pr_err("timer: failed to initialize clock source %s\n", "mtu_0"); + return ret; + } #ifdef CONFIG_CLKSRC_NOMADIK_MTU_SCHED_CLOCK sched_clock_register(nomadik_read_sched_clock, 32, rate); @@ -244,9 +247,11 @@ static void __init nmdk_timer_init(void __iomem *base, int irq, mtu_delay_timer.read_current_timer = &nmdk_timer_read_current_timer; mtu_delay_timer.freq = rate; register_current_timer_delay(&mtu_delay_timer); + + return 0; } -static void __init nmdk_timer_of_init(struct device_node *node) +static int __init nmdk_timer_of_init(struct device_node *node) { struct clk *pclk; struct clk *clk; @@ -254,22 +259,30 @@ static void __init nmdk_timer_of_init(struct device_node *node) int irq; base = of_iomap(node, 0); - if (!base) - panic("Can't remap registers"); + if (!base) { + pr_err("Can't remap registers"); + return -ENXIO; + } pclk = of_clk_get_by_name(node, "apb_pclk"); - if (IS_ERR(pclk)) - panic("could not get apb_pclk"); + if (IS_ERR(pclk)) { + pr_err("could not get apb_pclk"); + return PTR_ERR(pclk); + } clk = of_clk_get_by_name(node, "timclk"); - if (IS_ERR(clk)) - panic("could not get timclk"); + if (IS_ERR(clk)) { + pr_err("could not get timclk"); + return PTR_ERR(clk); + } irq = irq_of_parse_and_map(node, 0); - if (irq <= 0) - panic("Can't parse IRQ"); + if (irq <= 0) { + pr_err("Can't parse IRQ"); + return -EINVAL; + } - nmdk_timer_init(base, irq, pclk, clk); + return nmdk_timer_init(base, irq, pclk, clk); } -CLOCKSOURCE_OF_DECLARE(nomadik_mtu, "st,nomadik-mtu", +CLOCKSOURCE_OF_DECLARE_RET(nomadik_mtu, "st,nomadik-mtu", nmdk_timer_of_init); |