[PATCH 5.10 321/717] clocksource/drivers/arm_arch_timer: Use stable count reader in erratum sne

[Greg Kroah-Hartman]

From: Keqian Zhu <zhukeqi...@huawei.com>

[ Upstream commit d8cc3905b8073c7cfbff94af889fa8dc71f21dd5 ]

In commit 0ea415390cd3 ("clocksource/arm_arch_timer: Use arch_timer_read_counter
to access stable counters"), we separate stable and normal count reader to omit
unnecessary overhead on systems that have no timer erratum.

However, in erratum_set_next_event_tval_generic(), count reader becomes normal
reader. This converts it to stable reader.

Fixes: 0ea415390cd3 ("clocksource/arm_arch_timer: Use arch_timer_read_counter 
to access stable counters")
Acked-by: Marc Zyngier <m...@kernel.org>
Signed-off-by: Keqian Zhu <zhukeqi...@huawei.com>
Signed-off-by: Daniel Lezcano <daniel.lezc...@linaro.org>
Link: https://lore.kernel.org/r/20201204073126.6920-2-zhukeqi...@huawei.com
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/clocksource/arm_arch_timer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c 
b/drivers/clocksource/arm_arch_timer.c
index 6c3e841801461..777d38cb39b09 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -396,10 +396,10 @@ static void erratum_set_next_event_tval_generic(const int 
access, unsigned long
        ctrl &= ~ARCH_TIMER_CTRL_IT_MASK;
 
        if (access == ARCH_TIMER_PHYS_ACCESS) {
-               cval = evt + arch_counter_get_cntpct();
+               cval = evt + arch_counter_get_cntpct_stable();
                write_sysreg(cval, cntp_cval_el0);
        } else {
-               cval = evt + arch_counter_get_cntvct();
+               cval = evt + arch_counter_get_cntvct_stable();
                write_sysreg(cval, cntv_cval_el0);
        }
 
-- 
2.27.0