Messages in this thread | | | Date | Tue, 16 Sep 2014 17:01:04 -0700 | From | Stephen Boyd <> | Subject | Re: [PATCH] clocksource: arm_arch_timer: discard unavailable timers correctly |
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On 09/17, Sudeep Holla wrote: > Currently we wait until both nodes are probed if we have two timers > without checking if the device is actually available. This might
device node is actually available?
> result in non-functional system as no timer gets registered. > > This patch adds the check for the availablity of the timer device > so that unavailable timers are discarded correctly. > > Cc: Stephen Boyd <sboyd@codeaurora.org> > Cc: Mark Rutland <mark.rutland@arm.com> > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> > ---
Looks mostly ok. Comment below could be a follow up I guess.
> drivers/clocksource/arm_arch_timer.c | 12 ++++++++---- > 1 file changed, 8 insertions(+), 4 deletions(-) > > diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c > index 5163ec1..4d025ad 100644 > --- a/drivers/clocksource/arm_arch_timer.c > +++ b/drivers/clocksource/arm_arch_timer.c > @@ -622,11 +622,15 @@ static void __init arch_timer_common_init(void) > > /* Wait until both nodes are probed if we have two timers */ > if ((arch_timers_present & mask) != mask) { > - if (of_find_matching_node(NULL, arch_timer_mem_of_match) && > - !(arch_timers_present & ARCH_MEM_TIMER)) > + struct device_node *dn; > + > + dn = of_find_matching_node(NULL, arch_timer_mem_of_match); > + if (dn && of_device_is_available(dn) && > + !(arch_timers_present & ARCH_MEM_TIMER)) > return; > - if (of_find_matching_node(NULL, arch_timer_of_match) && > - !(arch_timers_present & ARCH_CP15_TIMER)) > + dn = of_find_matching_node(NULL, arch_timer_of_match); > + if (dn && of_device_is_available(dn) && > + !(arch_timers_present & ARCH_CP15_TIMER)) > return;
Where's the of_node_put()?
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