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ARM: bcm: fix a leaked reference by adding missing of_node_put

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The call to of_get_next_child returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./arch/arm/mach-bcm/board_bcm281xx.c:43:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 35, but without a corresponding object release within this function.
./arch/arm/mach-bcm/platsmp-brcmstb.c:337:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 329, but without a corresponding object release within this function.
./arch/arm/mach-bcm/platsmp-brcmstb.c:341:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 329, but without a corresponding object release within this functio
./arch/arm/mach-bcm/bcm63xx_smp.c:150:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 130, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Gregory Fong <gregory.0xf0@gmail.com>
Acked-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
This commit is contained in:
Wen Yang 2019-03-05 19:33:53 +08:00 committed by Florian Fainelli
parent a188339ca5
commit 8abc5a7ce6
3 changed files with 7 additions and 2 deletions
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1
arch/arm/mach-bcm/bcm63xx_smp.c
View File

@ -142,6 +142,7 @@ static int bcm63138_smp_boot_secondary(unsigned int cpu,
* return
*/
ret = bcm63xx_pmb_power_on_cpu(dn);
of_node_put(dn);
if (ret)
goto out;
out:

1
arch/arm/mach-bcm/board_bcm281xx.c
View File

@ -38,6 +38,7 @@ static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
return;
}
base = of_iomap(np_wdog, 0);
of_node_put(np_wdog);
if (!base) {
pr_emerg("Couldn't map brcm,kona-wdt\n");
return;

7
arch/arm/mach-bcm/platsmp-brcmstb.c
View File

@ -334,11 +334,14 @@ static void __init brcmstb_cpu_ctrl_setup(unsigned int max_cpus)
rc = setup_hifcpubiuctrl_regs(np);
if (rc)
return;
goto out_put_node;
rc = setup_hifcont_regs(np);
if (rc)
return;
goto out_put_node;
out_put_node:
of_node_put(np);
}
static int brcmstb_boot_secondary(unsigned int cpu, struct task_struct *idle)