diff --git a/arch/mips/alchemy/common/dbdma.c b/arch/mips/alchemy/common/dbdma.c
index 19c1c82849ff53ecabd77c49a24eb51a5222f0ac..5c68569344c104966159121d385aca43576f6f12 100644
--- a/arch/mips/alchemy/common/dbdma.c
+++ b/arch/mips/alchemy/common/dbdma.c
@@ -613,7 +613,7 @@ u32 _au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes, u32 flags)
 	dma_cache_wback_inv((unsigned long)buf, nbytes);
 	dp->dscr_cmd0 |= DSCR_CMD0_V;	/* Let it rip */
 	au_sync();
-	dma_cache_wback_inv((unsigned long)dp, sizeof(dp));
+	dma_cache_wback_inv((unsigned long)dp, sizeof(*dp));
 	ctp->chan_ptr->ddma_dbell = 0;
 
 	/* Get next descriptor pointer.	*/
@@ -676,7 +676,7 @@ _au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes, u32 flags)
 	dma_cache_inv((unsigned long)buf, nbytes);
 	dp->dscr_cmd0 |= DSCR_CMD0_V;	/* Let it rip */
 	au_sync();
-	dma_cache_wback_inv((unsigned long)dp, sizeof(dp));
+	dma_cache_wback_inv((unsigned long)dp, sizeof(*dp));
 	ctp->chan_ptr->ddma_dbell = 0;
 
 	/* Get next descriptor pointer.	*/