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arm/mach-at91/pm : fix possible object reference leak 

of_find_device_by_node() takes a reference to the struct device
when it finds a match via get_device. When returning error we should
call put_device.

Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
This commit is contained in:
Peng Hao 2019-04-02 22:12:38 +08:00 committed by Ludovic Desroches
parent e7dfb6d04e
commit ba5e60c9b7
1 changed files with 4 additions and 2 deletions
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6
arch/arm/mach-at91/pm.c
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@ -591,13 +591,13 @@ static int __init at91_pm_backup_init(void)
np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-securam"); np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-securam");
if (!np) if (!np)
goto securam_fail; goto securam_fail_no_ref_dev;
pdev = of_find_device_by_node(np); pdev = of_find_device_by_node(np);
of_node_put(np); of_node_put(np);
if (!pdev) { if (!pdev) {
pr_warn("%s: failed to find securam device!\n", __func__); pr_warn("%s: failed to find securam device!\n", __func__);
goto securam_fail; goto securam_fail_no_ref_dev;
} }
sram_pool = gen_pool_get(&pdev->dev, NULL); sram_pool = gen_pool_get(&pdev->dev, NULL);
@ -620,6 +620,8 @@ static int __init at91_pm_backup_init(void)
return 0; return 0;
securam_fail: securam_fail:
put_device(&pdev->dev);
securam_fail_no_ref_dev:
iounmap(pm_data.sfrbu); iounmap(pm_data.sfrbu);
pm_data.sfrbu = NULL; pm_data.sfrbu = NULL;
return ret; return ret;