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Date:   Sun,  7 Apr 2019 14:19:07 -0700
From:   Florian Fainelli <>
Cc:     Florian Fainelli <>,
        Brian Norris <>,
        Gregory Fong <>, (maintainer:BROADCOM BCM7XXX ARM
        ARCHITECTURE), (open list)
Subject: [PATCH] soc: brcmstb: Fix error path for unsupported CPUs

In case setup_hifcpubiuctrl_regs() returns an error, because of e.g:
an unsupported CPU type, just catch that error and return instead of
blindly continuing with the initialization. This fixes a NULL pointer
de-reference with the code continuing without having a proper array of
registers to use.

Fixes: 22f7a9116eba ("soc: brcmstb: Correct CPU_CREDIT_REG offset for Brahma-B53 CPUs")
Signed-off-by: Florian Fainelli <>
 drivers/soc/bcm/brcmstb/biuctrl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/bcm/brcmstb/biuctrl.c b/drivers/soc/bcm/brcmstb/biuctrl.c
index 6d89ebf13b8a..c16273b31b94 100644
--- a/drivers/soc/bcm/brcmstb/biuctrl.c
+++ b/drivers/soc/bcm/brcmstb/biuctrl.c
@@ -246,7 +246,9 @@ static int __init brcmstb_biuctrl_init(void)
 	if (!np)
 		return 0;
-	setup_hifcpubiuctrl_regs(np);
+	ret = setup_hifcpubiuctrl_regs(np);
+	if (ret)
+		return ret;
 	ret = mcp_write_pairing_set();
 	if (ret) {

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