6.10-stable review patch. If anyone has any objections, please let me know.
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From: Huacai Chen chenhuacai@loongson.cn
commit 81a91abab1307d7725fa4620952c0767beae7753 upstream.
lpic_gsi_to_irq() should return a valid Linux interrupt number if acpi_register_gsi() succeeds, and return 0 otherwise. But lpic_gsi_to_irq() converts a negative return value of acpi_register_gsi() to a positive value silently.
Convert the return value explicitly.
Fixes: e8bba72b396c ("irqchip / ACPI: Introduce ACPI_IRQ_MODEL_LPIC for LoongArch") Reported-by: Miao Wang shankerwangmiao@gmail.com Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Thomas Gleixner tglx@linutronix.de Reviewed-by: Jiaxun Yang jiaxun.yang@flygoat.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20240723064508.35560-1-chenhuacai@loongson.cn Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/irqchip/irq-loongarch-cpu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/irqchip/irq-loongarch-cpu.c +++ b/drivers/irqchip/irq-loongarch-cpu.c @@ -18,11 +18,13 @@ struct fwnode_handle *cpuintc_handle;
static u32 lpic_gsi_to_irq(u32 gsi) { + int irq = 0; + /* Only pch irqdomain transferring is required for LoongArch. */ if (gsi >= GSI_MIN_PCH_IRQ && gsi <= GSI_MAX_PCH_IRQ) - return acpi_register_gsi(NULL, gsi, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_HIGH); + irq = acpi_register_gsi(NULL, gsi, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_HIGH);
- return 0; + return (irq > 0) ? irq : 0; }
static struct fwnode_handle *lpic_get_gsi_domain_id(u32 gsi)