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clocksource/drivers/nps: Convert init function to return error

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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>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Daniel Lezcano 2016-06-15 14:16:11 +02:00
parent dcbc0eddcb
commit 2d9b650616
1 changed files with 10 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/clocksource/timer-nps.c
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@ -55,8 +55,8 @@ static cycle_t nps_clksrc_read(struct clocksource *clksrc)
return (cycle_t)ioread32be(nps_msu_reg_low_addr[cluster]);
}
static void __init nps_setup_clocksource(struct device_node *node,
struct clk *clk)
static int __init nps_setup_clocksource(struct device_node *node,
struct clk *clk)
{
int ret, cluster;
@ -68,7 +68,7 @@ static void __init nps_setup_clocksource(struct device_node *node,
ret = clk_prepare_enable(clk);
if (ret) {
pr_err("Couldn't enable parent clock\n");
return;
return ret;
}
nps_timer_rate = clk_get_rate(clk);
@ -79,20 +79,22 @@ static void __init nps_setup_clocksource(struct device_node *node,
pr_err("Couldn't register clock source.\n");
clk_disable_unprepare(clk);
}
return ret;
}
static void __init nps_timer_init(struct device_node *node)
static int __init nps_timer_init(struct device_node *node)
{
struct clk *clk;
clk = of_clk_get(node, 0);
if (IS_ERR(clk)) {
pr_err("Can't get timer clock.\n");
return;
return PTR_ERR(clk);
}
nps_setup_clocksource(node, clk);
return nps_setup_clocksource(node, clk);
}
CLOCKSOURCE_OF_DECLARE(ezchip_nps400_clksrc, "ezchip,nps400-timer",
nps_timer_init);
CLOCKSOURCE_OF_DECLARE_RET(ezchip_nps400_clksrc, "ezchip,nps400-timer",
nps_timer_init);