drm/amdgpu: improve MSI-X handling (v3)

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Check the number of supported vectors and fall back to MSI if
we return or error or 0 MSI-X vectors.

v2: only allocate one vector.  We can't currently use more than
one anyway.

v3: install the irq on vector 0.

Tested-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Shaoyun liu  <shaoyun.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Alex Deucher 2019-10-03 10:34:30 -05:00

parent d4411d793e

commit 8a745c7ff2

1 changed files with 13 additions and 4 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c

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