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| author | Guenter Roeck <linux@roeck-us.net> | 2015-08-22 10:10:47 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-08-22 10:57:50 +0200 |
| commit | 85e1cd6e769dfc84995270d0a4838021fcb8602d (patch) | |
| tree | b2b2efa20c71e9e930f13765d0c976c5e619400b | |
| parent | Merge branch 'fortglx/4.3/time' of https://git.linaro.org/people/john.stultz/... (diff) | |
| download | linux-85e1cd6e769dfc84995270d0a4838021fcb8602d.tar.xz linux-85e1cd6e769dfc84995270d0a4838021fcb8602d.zip | |
hrtimer: Handle failure of tick_init_highres() gracefully
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 <lcapitulino@redhat.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: http://lkml.kernel.org/r/1440231047-16256-1-git-send-email-linux@roeck-us.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | kernel/time/hrtimer.c | 1 |
1 files changed, 1 insertions, 0 deletions
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; |