linux-kernel - [PATCH] gpio: eic-sprd: break loop when getting NULL device resource

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Message-Id: <20201209055106.840100-1-zhang.lyra@gmail.com>
Date:   Wed,  9 Dec 2020 13:51:06 +0800
From:   Chunyan Zhang <zhang.lyra@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>
Subject: [PATCH] gpio: eic-sprd: break loop when getting NULL device resource

From: Chunyan Zhang <chunyan.zhang@...soc.com>

EIC controller have unfixed numbers of banks on different Spreadtrum SoCs,
and each bank has its own base address, the loop of getting there base
address in driver should break if the resource gotten via
platform_get_resource() is NULL already. The later ones would be all NULL
even if the loop continues.

Fixes: 25518e024e3a ("gpio: Add Spreadtrum EIC driver support")
Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>
---
 drivers/gpio/gpio-eic-sprd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index ad61daf6c212..865ab2b34fdd 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -598,7 +598,7 @@ static int sprd_eic_probe(struct platform_device *pdev)
 		 */
 		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 		if (!res)
-			continue;
+			break;
 
 		sprd_eic->base[i] = devm_ioremap_resource(&pdev->dev, res);
 		if (IS_ERR(sprd_eic->base[i]))
-- 
2.25.1