[PATCH] drm/amdgpu: don't check the default value for vm size

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Avoids printing spurious messages like this:
[    3.102059] amdgpu 0000:01:00.0: VM size (-1) must be a power of 2

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 50001bf..ff90f78 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1074,6 +1074,10 @@ static void amdgpu_check_block_size(struct amdgpu_device *adev)
 
 static void amdgpu_check_vm_size(struct amdgpu_device *adev)
 {
+	/* no need to check the default value */
+	if (amdgpu_vm_size == -1)
+		return;
+
 	if (!amdgpu_check_pot_argument(amdgpu_vm_size)) {
 		dev_warn(adev->dev, "VM size (%d) must be a power of 2\n",
 			 amdgpu_vm_size);
-- 
2.5.5



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