Currently we wait until both nodes are probed if we have two timers without checking if the device is actually available. This might 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 <[email protected]> Cc: Mark Rutland <[email protected]> Signed-off-by: Sudeep Holla <[email protected]> --- 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; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
