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clocksource/drivers/arm_arch_timer: Use stable count reader in erratum sne 

[ Upstream commit d8cc3905b8 ]

In commit 0ea415390c ("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: 0ea415390c ("clocksource/arm_arch_timer: Use arch_timer_read_counter to access stable counters")
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20201204073126.6920-2-zhukeqian1@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Keqian Zhu 2020-12-04 15:31:25 +08:00 committed by Greg Kroah-Hartman
parent e223cf39b9
commit b4219894d1
1 changed files with 2 additions and 2 deletions
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4
drivers/clocksource/arm_arch_timer.c
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@ -392,10 +392,10 @@ 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);
}