[PATCH 2/2] drm/amdgpu: disable MSI-X on APUs

[Alex Deucher]

Raven claims to support them, but seems to have problems.  Stick
with MSIs for now on APUs.

Tested-by: Tom St Denis <tom.stdenis at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 98aa28edba6a..8f2236bd7d0e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -248,7 +248,8 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
 		unsigned int flags;
 		int nvec = pci_msix_vec_count(adev->pdev);
 
-		if (nvec <= 0) {
+		/* Raven claims to support MSI-X, but seems to have problems */
+		if ((nvec <= 0) || (adev->flags & AMD_IS_APU)) {
 			flags = PCI_IRQ_MSI;
 			nvec = 1;
 		} else {
-- 
2.20.1