From: Sergei Shtylyov <sergei.shtyl...@cogentembedded.com>
The driver seems to abuse *unsigned long* not only for the (32-bit)
register values but also for the 'sh_cmt_channel::total_cycles' which
needs to always be 64-bit -- as a result, the clocksource's mask is
needlessly clamped down to 32-bits on the 32-bit machines...
Fixes: 19bdc9d061bc ("clocksource: sh_cmt clocksource support")
Reported-by: Geert Uytterhoeven <ge...@linux-m68k.org>
Signed-off-by: Sergei Shtylyov <sergei.shtyl...@cogentembedded.com>
Reviewed-by: Simon Horman <horms+rene...@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+rene...@glider.be>
Signed-off-by: Daniel Lezcano <daniel.lezc...@linaro.org>
---
drivers/clocksource/sh_cmt.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index efaf00d..0c74489 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -100,7 +100,7 @@ struct sh_cmt_channel {
raw_spinlock_t lock;
struct clock_event_device ced;
struct clocksource cs;
- unsigned long total_cycles;
+ u64 total_cycles;
bool cs_enabled;
};
@@ -605,8 +605,8 @@ static u64 sh_cmt_clocksource_read(struct clocksource *cs)
{
struct sh_cmt_channel *ch = cs_to_sh_cmt(cs);
unsigned long flags;
- unsigned long value;
u32 has_wrapped;
+ u64 value;
u32 raw;
raw_spin_lock_irqsave(&ch->lock, flags);
@@ -680,7 +680,7 @@ static int sh_cmt_register_clocksource(struct
sh_cmt_channel *ch,
cs->disable = sh_cmt_clocksource_disable;
cs->suspend = sh_cmt_clocksource_suspend;
cs->resume = sh_cmt_clocksource_resume;
- cs->mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);
+ cs->mask = CLOCKSOURCE_MASK(sizeof(u64) * 8);
cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
dev_info(&ch->cmt->pdev->dev, "ch%u: used as clock source\n",
--
2.7.4
