linux-kernel - [PATCH] irqchip/s3c24xx: Remove unneeded comparison of unsigned long to 0

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Date:   Mon, 13 Aug 2018 17:11:44 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] irqchip/s3c24xx: Remove unneeded comparison of unsigned long to 0

irq_data->hwirq is unsigned long.  This fixes GCC warning:

    drivers/irqchip/irq-s3c24xx.c: In function 's3c_irqext0_type':
    drivers/irqchip/irq-s3c24xx.c:253:19: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
      if ((data->hwirq >= 0) && (data->hwirq <= 3)) {
                       ^~

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
---
 drivers/irqchip/irq-s3c24xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-s3c24xx.c b/drivers/irqchip/irq-s3c24xx.c
index f6fd57ebe6e6..c19766fe8a1a 100644
--- a/drivers/irqchip/irq-s3c24xx.c
+++ b/drivers/irqchip/irq-s3c24xx.c
@@ -250,7 +250,7 @@ static int s3c_irqext0_type(struct irq_data *data, unsigned int type)
 	void __iomem *gpcon_reg;
 	unsigned long gpcon_offset, extint_offset;
 
-	if ((data->hwirq >= 0) && (data->hwirq <= 3)) {
+	if (data->hwirq <= 3) {
 		gpcon_reg = S3C2410_GPFCON;
 		extint_reg = S3C24XX_EXTINT0;
 		gpcon_offset = (data->hwirq) * 2;
-- 
2.14.1