diff --git a/drivers/video/rockchip/mpp/mpp_iommu.c b/drivers/video/rockchip/mpp/mpp_iommu.c
index 3df57083de75..833079ff8f90 100644
--- a/drivers/video/rockchip/mpp/mpp_iommu.c
+++ b/drivers/video/rockchip/mpp/mpp_iommu.c
@@ -38,11 +38,10 @@ mpp_dma_find_buffer_fd(struct mpp_dma_session *dma, int fd)
 	list_for_each_entry_safe(buffer, n,
 				 &dma->buffer_list, link) {
 		/*
-		 * As long as the last reference is hold by the buffer pool,
-		 * the same fd won't be assigned to the other application.
+		 * fd may dup several and point the same dambuf.
+		 * thus, here should be distinguish with the dmabuf.
 		 */
-		if (buffer->fd == fd &&
-		    buffer->dmabuf == dmabuf) {
+		if (buffer->dmabuf == dmabuf) {
 			out = buffer;
 			break;
 		}
@@ -205,7 +204,6 @@ struct mpp_dma_buffer *mpp_dma_import_fd(struct mpp_iommu_info *iommu_info,
 	}
 
 	buffer->dmabuf = dmabuf;
-	buffer->fd = fd;
 	buffer->dir = DMA_BIDIRECTIONAL;
 	buffer->last_used = ktime_get();
 
diff --git a/drivers/video/rockchip/mpp/mpp_iommu.h b/drivers/video/rockchip/mpp/mpp_iommu.h
index a8ba6b9f5f1d..767ada326897 100644
--- a/drivers/video/rockchip/mpp/mpp_iommu.h
+++ b/drivers/video/rockchip/mpp/mpp_iommu.h
@@ -27,7 +27,6 @@ struct mpp_dma_buffer {
 	struct sg_table *copy_sgt;
 	enum dma_data_direction dir;
 
-	int fd;
 	dma_addr_t iova;
 	unsigned long size;
 	void *vaddr;