linux-kernel - [PATCH 2/2] MIPS: SGI-IP27: use WARN

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Date: Tue, 16 Apr 2024 10:37:11 -0700
From: Yury Norov <yury.norov@...il.com>
To: Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Florian Fainelli <f.fainelli@...il.com>,
	linux-mips@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Yury Norov <yury.norov@...il.com>
Subject: [PATCH 2/2] MIPS: SGI-IP27: use WARN_ON() output

WARN_ON() propagates the result of conditional expression, and it can be
used to return early in the following expression in the arch_init_irq().

This is a no-op cleanup, except that compiler may optimize the error paths
better because WARN_ON() implies 'unlikely()'.

Signed-off-by: Yury Norov <yury.norov@...il.com>
---
 arch/mips/sgi-ip27/ip27-irq.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c
index d8acdf0439d2..00e63e9ef61d 100644
--- a/arch/mips/sgi-ip27/ip27-irq.c
+++ b/arch/mips/sgi-ip27/ip27-irq.c
@@ -289,13 +289,12 @@ void __init arch_init_irq(void)
 	bitmap_set(hub_irq_map, NI_BRDCAST_ERR_A, MSC_PANIC_INTR - NI_BRDCAST_ERR_A + 1);
 
 	fn = irq_domain_alloc_named_fwnode("HUB");
-	WARN_ON(fn == NULL);
-	if (!fn)
+	if (WARN_ON(fn == NULL))
 		return;
+
 	domain = irq_domain_create_linear(fn, IP27_HUB_IRQ_COUNT,
 					  &hub_domain_ops, NULL);
-	WARN_ON(domain == NULL);
-	if (!domain)
+	if (WARN_ON(domain == NULL))
 		return;
 
 	irq_set_default_host(domain);
-- 
2.40.1