drm/amd/amdgpu: stored bios_size

It's necessary if we want to export vbios image out.

Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian Koenig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
index b7e2762..4f973a9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
@@ -74,6 +74,7 @@
 		iounmap(bios);
 		return false;
 	}
+	adev->bios_size = size;
 	memcpy_fromio(adev->bios, bios, size);
 	iounmap(bios);
 	return true;
@@ -103,6 +104,7 @@
 		pci_unmap_rom(adev->pdev, bios);
 		return false;
 	}
+	adev->bios_size = size;
 	memcpy_fromio(adev->bios, bios, size);
 	pci_unmap_rom(adev->pdev, bios);
 	return true;
@@ -135,6 +137,7 @@
 		DRM_ERROR("no memory to allocate for BIOS\n");
 		return false;
 	}
+	adev->bios_size = len;
 
 	/* read complete BIOS */
 	return amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
@@ -159,6 +162,7 @@
 	if (adev->bios == NULL) {
 		return false;
 	}
+	adev->bios_size = size;
 
 	return true;
 }
@@ -273,6 +277,7 @@
 		kfree(adev->bios);
 		return false;
 	}
+	adev->bios_size = size;
 	return true;
 }
 #else
@@ -334,6 +339,7 @@
 	}
 
 	adev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);
+	adev->bios_size = vhdr->ImageLength;
 	ret = !!adev->bios;
 
 out_unmap: