On Fri, Mar 31, 2023 at 07:38:56PM +0800, Jianmin Lv wrote:
In pch_pic_parse_madt(), a NULL parent pointer will be returned from acpi_get_vec_parent() for second pch-pic domain related to second bridge while calling eiointc_acpi_init() at first time, where the parent of it has not been initialized yet, and will be initialized during second time calling eiointc_acpi_init(). So, it's reasonable to return zero so that failure of acpi_table_parse_madt() will be avoided, or else acpi_cascade_irqdomain_init() will return and initialization of followed pch_msi domain will be skipped.
Although it does not matter when pch_msi_parse_madt() returns -EINVAL if no invalid parent is found, it's also reasonable to return zero for that.
Signed-off-by: Jianmin Lv lvjianmin@loongson.cn
drivers/irqchip/irq-loongson-eiointc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
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This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly.
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