diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index 728c0d8e849b847570950396909b864647182487..4858c9974c862a7d08f201b16b571d366446d3e2 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -1730,11 +1730,11 @@ static void sdma_v3_0_emit_fill_buffer(struct amdgpu_ib *ib,
 }
 
 static const struct amdgpu_buffer_funcs sdma_v3_0_buffer_funcs = {
-	.copy_max_bytes = 0x1fffff,
+	.copy_max_bytes = 0x3fffe0, /* not 0x3fffff due to HW limitation */
 	.copy_num_dw = 7,
 	.emit_copy_buffer = sdma_v3_0_emit_copy_buffer,
 
-	.fill_max_bytes = 0x1fffff,
+	.fill_max_bytes = 0x3fffe0, /* not 0x3fffff due to HW limitation */
 	.fill_num_dw = 5,
 	.emit_fill_buffer = sdma_v3_0_emit_fill_buffer,
 };