diff options
Diffstat (limited to 'drivers/dma/acpi-dma.c')
| -rw-r--r-- | drivers/dma/acpi-dma.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c index 52768dc8ce12..5906eae26e2a 100644 --- a/drivers/dma/acpi-dma.c +++ b/drivers/dma/acpi-dma.c @@ -75,8 +75,16 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp, si->mmio_base_high != upper_32_bits(mem)) return 0; - /* Match device by Linux vIRQ */ + /* + * acpi_gsi_to_irq() can't be used because some platforms do not save + * registered IRQs in the MP table. Instead we just try to register + * the GSI, which is the core part of the above mentioned function. + */ ret = acpi_register_gsi(NULL, si->gsi_interrupt, si->interrupt_mode, si->interrupt_polarity); + if (ret < 0) + return 0; + + /* Match device by Linux vIRQ */ if (ret != irq) return 0; |