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thermal/drivers/rcar: Replace spin_lock_irqsave by spin_lock in hard IRQ

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On RT or even on mainline with 'threadirqs' on the command line all
interrupts which are not explicitly requested with IRQF_NO_THREAD
run their handlers in thread context. The same applies to soft interrupts.
That means they are subject to the normal scheduler rules and no other
code is going to acquire that lock from hard interrupt context either,
so the irqsave() here is pointless in all cases.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1603760790-37748-1-git-send-email-tiantao6@hisilicon.com
This commit is contained in:
Tian Tao 2020-10-27 09:06:30 +08:00 committed by Daniel Lezcano
parent 37b2539e63
commit 4eb7d0cd59
1 changed files with 2 additions and 3 deletions
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5
drivers/thermal/rcar_thermal.c
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@ -409,16 +409,15 @@ static irqreturn_t rcar_thermal_irq(int irq, void *data)
{
struct rcar_thermal_common *common = data;
struct rcar_thermal_priv *priv;
unsigned long flags;
u32 status, mask;
spin_lock_irqsave(&common->lock, flags);
spin_lock(&common->lock);
mask = rcar_thermal_common_read(common, INTMSK);
status = rcar_thermal_common_read(common, STR);
rcar_thermal_common_write(common, STR, 0x000F0F0F & mask);
spin_unlock_irqrestore(&common->lock, flags);
spin_unlock(&common->lock);
status = status & ~mask;