linux-kernel - [PATCH] genirq:free_irq:remove redundant null ptr check

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Message-Id: <20180717102009.7708-1-raghuhack78@gmail.com>
Date:   Tue, 17 Jul 2018 15:50:09 +0530
From:   RAGHU Halharvi <raghuhack78@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     RAGHU Halharvi <raghuhack78@...il.com>, tglx@...utronix.de
Subject: [PATCH] genirq:free_irq:remove redundant null ptr check

* Remove the misleading null pointer check in __free_irq, its redundant because
the callee checks before calling __free_irq.

Signed-off-by: RAGHU Halharvi <raghuhack78@...il.com>
---
 kernel/irq/manage.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index facfecfc543c..7246f6c7f702 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1563,9 +1563,6 @@ static struct irqaction *__free_irq(struct irq_desc *desc, void *dev_id)
 
 	WARN(in_interrupt(), "Trying to free IRQ %d from IRQ context!\n", irq);
 
-	if (!desc)
-		return NULL;
-
 	mutex_lock(&desc->request_mutex);
 	chip_bus_lock(desc);
 	raw_spin_lock_irqsave(&desc->lock, flags);
-- 
2.17.1