[PATCH AUTOSEL 5.2 018/123] MIPS: kernel: only use i8253 clocksource with periodic clockevent

[Sasha Levin]

From: Thomas Bogendoerfer <tbogendoer...@suse.de>

[ Upstream commit a07e3324538a989b7cdbf2c679be6a7f9df2544f ]

i8253 clocksource needs a free running timer. This could only
be used, if i8253 clockevent is set up as periodic.

Signed-off-by: Thomas Bogendoerfer <tbogendoer...@suse.de>
Signed-off-by: Paul Burton <paul.bur...@mips.com>
Cc: Ralf Baechle <r...@linux-mips.org>
Cc: James Hogan <jho...@kernel.org>
Cc: linux-m...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 arch/mips/kernel/i8253.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/mips/kernel/i8253.c b/arch/mips/kernel/i8253.c
index 5f209f111e59e..df7ddd246eaac 100644
--- a/arch/mips/kernel/i8253.c
+++ b/arch/mips/kernel/i8253.c
@@ -32,7 +32,8 @@ void __init setup_pit_timer(void)
 
 static int __init init_pit_clocksource(void)
 {
-       if (num_possible_cpus() > 1) /* PIT does not scale! */
+       if (num_possible_cpus() > 1 || /* PIT does not scale! */
+           !clockevent_state_periodic(&i8253_clockevent))
                return 0;
 
        return clocksource_i8253_init();
-- 
2.20.1