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| author | Jianmin Lv <lvjianmin@loongson.cn> | 2023-04-07 11:34:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-17 12:53:48 +0300 |
| commit | 84c64fb57887595ba33edccb69a442b667bb5ead (patch) | |
| tree | 8d0fe63fd3ff0ad4a2282d0432d5be0c5b02c59c /drivers/irqchip | |
| parent | 8a0b544b7caedfbc05065b6377fd1d8bf7ef5e70 (diff) | |
| download | linux-84c64fb57887595ba33edccb69a442b667bb5ead.tar.xz | |
irqchip/loongson-pch-pic: Fix pch_pic_acpi_init calling
commit 48ce2d722f7f108f27bedddf54bee3423a57ce57 upstream.
For dual-bridges scenario, pch_pic_acpi_init() will be called
in following path:
cpuintc_acpi_init
acpi_cascade_irqdomain_init(in cpuintc driver)
acpi_table_parse_madt
eiointc_parse_madt
eiointc_acpi_init /* this will be called two times
correspondingto parsing two
eiointc entries in MADT under
dual-bridges scenario*/
acpi_cascade_irqdomain_init(in eiointc driver)
acpi_table_parse_madt
pch_pic_parse_madt
pch_pic_acpi_init /* this will be called depend
on valid parent IRQ domain
handle for one or two times
corresponding to parsing
two pchpic entries in MADT
druring calling
eiointc_acpi_init() under
dual-bridges scenario*/
During the first eiointc_acpi_init() calling, the
pch_pic_acpi_init() will be called just one time since only
one valid parent IRQ domain handle will be found for current
eiointc IRQ domain.
During the second eiointc_acpi_init() calling, the
pch_pic_acpi_init() will be called two times since two valid
parent IRQ domain handles will be found. So in pch_pic_acpi_init(),
we must have a reasonable way to prevent from creating second same
pch_pic IRQ domain.
The patch matches gsi base information in created pch_pic IRQ
domains to check if the target domain has been created to avoid the
bug mentioned above.
Cc: stable@vger.kernel.org
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230407083453.6305-6-lvjianmin@loongson.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-loongson-pch-pic.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-loongson-pch-pic.c b/drivers/irqchip/irq-loongson-pch-pic.c index 03493cda65a3..9d2250e27758 100644 --- a/drivers/irqchip/irq-loongson-pch-pic.c +++ b/drivers/irqchip/irq-loongson-pch-pic.c @@ -350,6 +350,9 @@ int __init pch_pic_acpi_init(struct irq_domain *parent, int ret, vec_base; struct fwnode_handle *domain_handle; + if (find_pch_pic(acpi_pchpic->gsi_base) >= 0) + return 0; + vec_base = acpi_pchpic->gsi_base - GSI_MIN_PCH_IRQ; domain_handle = irq_domain_alloc_fwnode(&acpi_pchpic->address); |