clocksource/mips-gic-timer: Print an error if IRQ setup fails

We've checked for errors from setup_irq_percpu since commit f95ac8558b88
("CLOCKSOURCE: mips-gic: Add missing error returns checks") but didn't
print an error message in the failure case. This makes it very easy to
overlook the GIC timer clock event driver not being registered, since
we'll generally just use a different clock event driver if that happens.

Print an error if IRQ setup fails in order to make such problems harder
to miss (ie. not completely silent).

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: http://lkml.kernel.org/r/20160913165644.627-1-paul.burton@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c
index b4b3ab5a11ad006cd0bf2bd4db50627057ea27c8..802055ba1cbfb6c89f43816b8a4eeea63a370c48 100644 (file)
--- a/drivers/clocksource/mips-gic-timer.c
+++ b/drivers/clocksource/mips-gic-timer.c
@@ -113,8 +113,11 @@ static int gic_clockevent_init(void)
                return -ENXIO;
 
        ret = setup_percpu_irq(gic_timer_irq, &gic_compare_irqaction);
-       if (ret < 0)
+       if (ret < 0) {
+               pr_err("GIC timer IRQ %d setup failed: %d\n",
+                      gic_timer_irq, ret);
                return ret;
+       }
 
        cpuhp_setup_state(CPUHP_AP_MIPS_GIC_TIMER_STARTING,
                          "AP_MIPS_GIC_TIMER_STARTING", gic_starting_cpu,