[PATCH] ipmi_si: replace spin_lock_irqsave by spin_lock in hard IRQ

From: Tian Tao
Date: Sat Oct 17 2020 - 01:28:43 EST


It is redundant to do irqsave and irqrestore in hardIRQ context.

Signed-off-by: Tian Tao <tiantao6@xxxxxxxxxxxxx>
---
drivers/char/ipmi/ipmi_si_intf.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 45546ac..97452a8 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1116,7 +1116,6 @@ static void smi_timeout(struct timer_list *t)
irqreturn_t ipmi_si_irq_handler(int irq, void *data)
{
struct smi_info *smi_info = data;
- unsigned long flags;

if (smi_info->io.si_type == SI_BT)
/* We need to clear the IRQ flag for the BT interface. */
@@ -1124,14 +1123,14 @@ irqreturn_t ipmi_si_irq_handler(int irq, void *data)
IPMI_BT_INTMASK_CLEAR_IRQ_BIT
| IPMI_BT_INTMASK_ENABLE_IRQ_BIT);

- spin_lock_irqsave(&(smi_info->si_lock), flags);
+ spin_lock(&(smi_info->si_lock));

smi_inc_stat(smi_info, interrupts);

debug_timestamp("Interrupt");

smi_event_handler(smi_info, 0);
- spin_unlock_irqrestore(&(smi_info->si_lock), flags);
+ spin_unlock(&(smi_info->si_lock));
return IRQ_HANDLED;
}

--
2.7.4