linux-kernel - [PATCH] soc: aspeed: lpc: Fix impossible judgment condition

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Message-Id: <20231027020703.1231875-1-suhui@nfschina.com>
Date:   Fri, 27 Oct 2023 10:07:04 +0800
From:   Su Hui <suhui@...china.com>
To:     joel@....id.au, andrew@...econstruct.com.au
Cc:     Su Hui <suhui@...china.com>, robh@...nel.org, arnd@...db.de,
        gregkh@...uxfoundation.org, roblip@...il.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] soc: aspeed: lpc: Fix impossible judgment condition

smatch error：
drivers/soc/aspeed/aspeed-lpc-snoop.c:169
aspeed_lpc_snoop_config_irq() warn: platform_get_irq() does not return zero

platform_get_irq() return non-zero IRQ number or negative error code,
change '!lpc_snoop->irq' to 'lpc_snoop->irq < 0' to fix this.

Fixes: 9f4f9ae81d0a ("drivers/misc: add Aspeed LPC snoop driver")
Signed-off-by: Su Hui <suhui@...china.com>
---
 drivers/soc/aspeed/aspeed-lpc-snoop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/aspeed/aspeed-lpc-snoop.c b/drivers/soc/aspeed/aspeed-lpc-snoop.c
index 773dbcbc03a6..8cb3a0b4692c 100644
--- a/drivers/soc/aspeed/aspeed-lpc-snoop.c
+++ b/drivers/soc/aspeed/aspeed-lpc-snoop.c
@@ -166,7 +166,7 @@ static int aspeed_lpc_snoop_config_irq(struct aspeed_lpc_snoop *lpc_snoop,
 	int rc;
 
 	lpc_snoop->irq = platform_get_irq(pdev, 0);
-	if (!lpc_snoop->irq)
+	if (lpc_snoop->irq < 0)
 		return -ENODEV;
 
 	rc = devm_request_irq(dev, lpc_snoop->irq,
-- 
2.30.2