linux-kernel - [PATCH] arm/mach-at91/pm: Do not double put the device node

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Message-ID: <1534211696-4221-1-git-send-email-zhongjiang@huawei.com>
Date:   Tue, 14 Aug 2018 09:54:56 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <linux@...linux.org.uk>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] arm/mach-at91/pm: Do not double put the device node

Device node iterators put the previous value of the index variable,
so an explicit put causes a double put.

I detect the issue with the help of Coccinelle.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
---
 arch/arm/mach-at91/pm.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 32fae4d..a5ec35f 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -143,15 +143,12 @@ static int at91_pm_config_ws(unsigned int pm_mode, bool set)
 
 			/* Check if enabled on SHDWC. */
 			if (wsi->shdwc_mr_bit && !(val & wsi->shdwc_mr_bit))
-				goto put_node;
+				continue;
 
 			mode |= wsi->pmc_fsmr_bit;
 			if (wsi->set_polarity)
 				polarity |= wsi->pmc_fsmr_bit;
 		}
-
-put_node:
-		of_node_put(np);
 	}
 
 	if (mode) {
-- 
1.7.12.4