linux-kernel - [PATCH 4.9 089/212] ARM: at91: pm: add missing put_device() call in at91_pm_sram

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Message-Id: <20200820091606.844090402@linuxfoundation.org>
Date:   Thu, 20 Aug 2020 11:21:02 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, yu kuai <yukuai3@...wei.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 089/212] ARM: at91: pm: add missing put_device() call in at91_pm_sram_init()

From: yu kuai <yukuai3@...wei.com>

[ Upstream commit f87a4f022c44e5b87e842a9f3e644fba87e8385f ]

if of_find_device_by_node() succeed, at91_pm_sram_init() doesn't have
a corresponding put_device(). Thus add a jump target to fix the exception
handling for this function implementation.

Fixes: d2e467905596 ("ARM: at91: pm: use the mmio-sram pool to access SRAM")
Signed-off-by: yu kuai <yukuai3@...wei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Link: https://lore.kernel.org/r/20200604123301.3905837-1-yukuai3@huawei.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/mach-at91/pm.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 8ba0e2e5ad97c..0efac1404418e 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -411,13 +411,13 @@ static void __init at91_pm_sram_init(void)
 	sram_pool = gen_pool_get(&pdev->dev, NULL);
 	if (!sram_pool) {
 		pr_warn("%s: sram pool unavailable!\n", __func__);
-		return;
+		goto out_put_device;
 	}
 
 	sram_base = gen_pool_alloc(sram_pool, at91_pm_suspend_in_sram_sz);
 	if (!sram_base) {
 		pr_warn("%s: unable to alloc sram!\n", __func__);
-		return;
+		goto out_put_device;
 	}
 
 	sram_pbase = gen_pool_virt_to_phys(sram_pool, sram_base);
@@ -425,12 +425,17 @@ static void __init at91_pm_sram_init(void)
 					at91_pm_suspend_in_sram_sz, false);
 	if (!at91_suspend_sram_fn) {
 		pr_warn("SRAM: Could not map\n");
-		return;
+		goto out_put_device;
 	}
 
 	/* Copy the pm suspend handler to SRAM */
 	at91_suspend_sram_fn = fncpy(at91_suspend_sram_fn,
 			&at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
+	return;
+
+out_put_device:
+	put_device(&pdev->dev);
+	return;
 }
 
 static const struct of_device_id atmel_pmc_ids[] __initconst = {
-- 
2.25.1