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rtc: cmos: Replace spin_lock_irqsave with spin_lock in hard IRQ

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[ Upstream commit 6950d046eb6eabbc271fda416460c05f7a85698a ]

It is redundant to do irqsave and irqrestore in hardIRQ context, where
it has been in a irq-disabled context.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1612355981-6764-2-git-send-email-tanxiaofei@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiaofei Tan 2021-02-03 20:39:36 +08:00 committed by Greg Kroah-Hartman
parent acfd8ef683
commit 17293d630f
1 changed files with 2 additions and 3 deletions
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5
drivers/rtc/rtc-cmos.c
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@ -704,11 +704,10 @@ static struct cmos_rtc cmos_rtc;
static irqreturn_t cmos_interrupt(int irq, void *p)
{
unsigned long flags;
u8 irqstat;
u8 rtc_control;
spin_lock_irqsave(&rtc_lock, flags);
spin_lock(&rtc_lock);
/* When the HPET interrupt handler calls us, the interrupt
* status is passed as arg1 instead of the irq number. But
@ -742,7 +741,7 @@ static irqreturn_t cmos_interrupt(int irq, void *p)
hpet_mask_rtc_irq_bit(RTC_AIE);
CMOS_READ(RTC_INTR_FLAGS);
}
spin_unlock_irqrestore(&rtc_lock, flags);
spin_unlock(&rtc_lock);
if (is_intr(irqstat)) {
rtc_update_irq(p, 1, irqstat);