Index: sys/dev/sfxge/common/ef10_rx.c
===================================================================
--- sys/dev/sfxge/common/ef10_rx.c
+++ sys/dev/sfxge/common/ef10_rx.c
@@ -710,6 +710,14 @@
 }
 #endif /* EFSYS_OPT_RX_SCALE */
 
+#if EFSYS_OPT_RX_PACKED_STREAM
+/*
+ * Fake length for RXQ descriptors in packed stream mode
+ * to make hardware happy
+ */
+#define	EFX_RXQ_PACKED_STREAM_FAKE_BUF_SIZE 32
+#endif
+
 			void
 ef10_rx_qpost(
 	__in		efx_rxq_t *erp,
@@ -724,6 +732,15 @@
 	unsigned int offset;
 	unsigned int id;
 
+#if EFSYS_OPT_RX_PACKED_STREAM
+	/*
+	 * Real size of the buffer does not fit into ESF_DZ_RX_KER_BYTE_CNT
+	 * and equal to 0 after applying mask. Hardware does not like it.
+	 */
+	if (erp->er_ev_qstate->eers_rx_packed_stream)
+		size = EFX_RXQ_PACKED_STREAM_FAKE_BUF_SIZE;
+#endif
+
 	/* The client driver must not overfill the queue */
 	EFSYS_ASSERT3U(added - completed + n, <=,
 	    EFX_RXQ_LIMIT(erp->er_mask + 1));
Index: sys/dev/sfxge/common/efx.h
===================================================================
--- sys/dev/sfxge/common/efx.h
+++ sys/dev/sfxge/common/efx.h
@@ -2050,12 +2050,6 @@
 
 #if EFSYS_OPT_RX_PACKED_STREAM
 
-/*
- * Fake length for RXQ descriptors in packed stream mode
- * to make hardware happy
- */
-#define	EFX_RXQ_PACKED_STREAM_FAKE_BUF_SIZE 32
-
 extern			void
 efx_rx_qpush_ps_credits(
 	__in		efx_rxq_t *erp);