Commit 75e3b37d0598 ("hrtimer: Drop return code of hrtimer_switch_to_hres()")
drops the return code of hrtimer_switch_to_hres(). While doing so, it also
drops the return statement itself on failure. This may cause a system hang.
Seen when running arm:multi_v7_defconfig in qemu with devicetree file
vexpress-v2p-ca9.
Fixes: 75e3b37d0598 ("hrtimer: Drop return code of hrtimer_switch_to_hres()")
Cc: Luiz Capitulino <lcapitul...@redhat.com>
Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
kernel/time/hrtimer.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 5c4fe50e47d3..457a373e2181 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -695,6 +695,7 @@ static void hrtimer_switch_to_hres(void)
if (tick_init_highres()) {
printk(KERN_WARNING "Could not switch to high resolution "
"mode on CPU %d\n", base->cpu);
+ return;
}
base->hres_active = 1;
hrtimer_resolution = HIGH_RES_NSEC;
--
2.1.4
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