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irqchip/loongson-liointc: Fix improper error handling in liointc_init() 

[ Upstream commit 4a60a3cdcf ]

For cores less than 4, eg, loongson2k1000 with 2 cores, the
of_property_match_string() may return with an error value,
which causes that liointc could not work. At least isr0 is
what should be checked like previous commit b2c4c3969f
("irqchip/loongson-liointc: irqchip add 2.0 version") did.

Fixes: 0858ed035a ("irqchip/loongson-liointc: Add ACPI init support")
Signed-off-by: Liu Peibao <liupeibao@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221104110712.23300-1-liupeibao@loongson.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Liu Peibao 2022-11-04 19:07:12 +08:00 committed by Greg Kroah-Hartman
parent bcbcb396e1
commit cb122b6fb4
1 changed files with 4 additions and 1 deletions
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5
drivers/irqchip/irq-loongson-liointc.c
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@ -207,10 +207,13 @@ static int liointc_init(phys_addr_t addr, unsigned long size, int revision,
"reg-names", core_reg_names[i]);
if (index < 0)
goto out_iounmap;
continue;
priv->core_isr[i] = of_iomap(node, index);
}
if (!priv->core_isr[0])
goto out_iounmap;
}
/* Setup IRQ domain */