kvm: Return -ENODEV from update_persistent_clock

jgunthorpe · bonzini · commit 008755209ce1 · 2017-11-02T18:23:18.000+01:00
kvm does not support setting the RTC, so the correct result is -ENODEV.
Returning -1 will cause sync_cmos_clock to keep trying to set the RTC
every second.

Signed-off-by: Jason Gunthorpe &lt;jgg@ziepe.ca&gt;
Signed-off-by: Paolo Bonzini &lt;pbonzini@redhat.com&gt;
diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
@@ -79,7 +79,7 @@ static void kvm_get_wallclock(struct timespec *now)
 
 static int kvm_set_wallclock(const struct timespec *now)
 {
-	return -1;
+	return -ENODEV;
 }
 
 static u64 kvm_clock_read(void)

Original file line number	Diff line number	Diff line change
`@@ -79,7 +79,7 @@ static void kvm_get_wallclock(struct timespec *now)`
`79`	`79`
`80`	`80`	`static int kvm_set_wallclock(const struct timespec *now)`
`81`	`81`	`{`
`82`		`- return -1;`
	`82`	`+ return -ENODEV;`
`83`	`83`	`}`
`84`	`84`
`85`	`85`	`static u64 kvm_clock_read(void)`