[PATCH v1 1/1] x86: tangier: Fix DMA controller IRQ polarity in CSRT

[Andy Shevchenko]

IRQ polarity in CSRT has the same definition as by ACPI specification
chapter 19.6.64 "Interrupt (Interrupt Resource Descriptor Macro)", i.e.
ActiveHigh is 0, and ActiveLow is 1. On Intel Tangier the DMA controller
IRQ polarity is ActiveHigh.

Note, in DSDT (see southcluster.asl) it's described correctly.

Fixes: 5e99fde34a77 ("x86: tangier: Populate CSRT for shared DMA controller")
Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
---
 arch/x86/cpu/tangier/acpi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/cpu/tangier/acpi.c b/arch/x86/cpu/tangier/acpi.c
index 41bd177e095f..82f4ce5a34a4 100644
--- a/arch/x86/cpu/tangier/acpi.c
+++ b/arch/x86/cpu/tangier/acpi.c
@@ -89,8 +89,8 @@ static u32 acpi_fill_csrt_dma(struct acpi_csrt_group *grp)
 	si->mmio_base_low = 0xff192000;
 	si->mmio_base_high = 0;
 	si->gsi_interrupt = 32;
-	si->interrupt_polarity = 1;
-	si->interrupt_mode = 0;
+	si->interrupt_polarity = 0;	/* Active High */
+	si->interrupt_mode = 0;		/* Level triggered */
 	si->num_channels = 8;
 	si->dma_address_width = 32;
 	si->base_request_line = 0;
-- 
2.30.2