diff --git a/drivers/net/sfc/base/ef10_impl.h b/drivers/net/sfc/base/ef10_impl.h
index 83a8a2936..165a4013c 100644
--- a/drivers/net/sfc/base/ef10_impl.h
+++ b/drivers/net/sfc/base/ef10_impl.h
@@ -11,6 +11,7 @@
 extern "C" {
 #endif
 
+#define	EF10_TXQ_MINNDESCS	512
 
 /* Number of hardware PIO buffers (for compile-time resource dimensions) */
 #define	EF10_MAX_PIOBUF_NBUFS	(16)
diff --git a/drivers/net/sfc/base/efx.h b/drivers/net/sfc/base/efx.h
index a612b6988..5b5d790fc 100644
--- a/drivers/net/sfc/base/efx.h
+++ b/drivers/net/sfc/base/efx.h
@@ -1272,6 +1272,7 @@ typedef struct efx_nic_cfg_s {
 	uint32_t		enc_txq_limit;
 	uint32_t		enc_rxq_limit;
 	uint32_t		enc_txq_max_ndescs;
+	uint32_t		enc_txq_min_ndescs;
 	uint32_t		enc_buftbl_limit;
 	uint32_t		enc_piobuf_limit;
 	uint32_t		enc_piobuf_size;
@@ -2627,6 +2628,10 @@ extern		void
 efx_tx_fini(
 	__in	efx_nic_t *enp);
 
+/*
+ * This symbol is deprecated and will be removed.
+ * Use the field from efx_nic_cfg_t instead.
+ */
 #define	EFX_TXQ_MINNDESCS		512
 
 #define	EFX_TXQ_SIZE(_ndescs)		((_ndescs) * sizeof (efx_qword_t))
diff --git a/drivers/net/sfc/base/efx_tx.c b/drivers/net/sfc/base/efx_tx.c
index 9fa9e2ed1..ebbdeb3d4 100644
--- a/drivers/net/sfc/base/efx_tx.c
+++ b/drivers/net/sfc/base/efx_tx.c
@@ -923,10 +923,10 @@ siena_tx_qcreate(
 	EFSYS_ASSERT3U(label, <, EFX_EV_TX_NLABELS);
 
 	EFSYS_ASSERT(ISP2(encp->enc_txq_max_ndescs));
-	EFX_STATIC_ASSERT(ISP2(EFX_TXQ_MINNDESCS));
+	EFSYS_ASSERT(ISP2(encp->enc_txq_min_ndescs));
 
 	if (!ISP2(ndescs) ||
-	    (ndescs < EFX_TXQ_MINNDESCS) ||
+	    (ndescs < encp->enc_txq_min_ndescs) ||
 	    (ndescs > encp->enc_txq_max_ndescs)) {
 		rc = EINVAL;
 		goto fail1;
@@ -936,9 +936,9 @@ siena_tx_qcreate(
 		goto fail2;
 	}
 	for (size = 0;
-	    (1 << size) <= (int)(encp->enc_txq_max_ndescs / EFX_TXQ_MINNDESCS);
+	    (1U << size) <= encp->enc_txq_max_ndescs / encp->enc_txq_min_ndescs;
 	    size++)
-		if ((1 << size) == (int)(ndescs / EFX_TXQ_MINNDESCS))
+		if ((1U << size) == (uint32_t)ndescs / encp->enc_txq_min_ndescs)
 			break;
 	if (id + (1 << size) >= encp->enc_buftbl_limit) {
 		rc = EINVAL;
diff --git a/drivers/net/sfc/base/hunt_nic.c b/drivers/net/sfc/base/hunt_nic.c
index ca30e90f7..adb2b17eb 100644
--- a/drivers/net/sfc/base/hunt_nic.c
+++ b/drivers/net/sfc/base/hunt_nic.c
@@ -195,6 +195,7 @@ hunt_board_cfg(
 	 * descriptor writes, preventing the use of 4096 descriptor TXQs.
 	 */
 	encp->enc_txq_max_ndescs = encp->enc_bug35388_workaround ? 2048 : 4096;
+	encp->enc_txq_min_ndescs = EF10_TXQ_MINNDESCS;
 
 	EFX_STATIC_ASSERT(HUNT_PIOBUF_NBUFS <= EF10_MAX_PIOBUF_NBUFS);
 	encp->enc_piobuf_limit = HUNT_PIOBUF_NBUFS;
diff --git a/drivers/net/sfc/base/medford2_nic.c b/drivers/net/sfc/base/medford2_nic.c
index 6bc1e87cc..2cc87e3a9 100644
--- a/drivers/net/sfc/base/medford2_nic.c
+++ b/drivers/net/sfc/base/medford2_nic.c
@@ -120,6 +120,7 @@ medford2_board_cfg(
 	 * stuffing.
 	 */
 	encp->enc_txq_max_ndescs = 2048;
+	encp->enc_txq_min_ndescs = EF10_TXQ_MINNDESCS;
 
 	EFX_STATIC_ASSERT(MEDFORD2_PIOBUF_NBUFS <= EF10_MAX_PIOBUF_NBUFS);
 	encp->enc_piobuf_limit = MEDFORD2_PIOBUF_NBUFS;
diff --git a/drivers/net/sfc/base/medford_nic.c b/drivers/net/sfc/base/medford_nic.c
index bfe01ca93..b72881179 100644
--- a/drivers/net/sfc/base/medford_nic.c
+++ b/drivers/net/sfc/base/medford_nic.c
@@ -118,6 +118,7 @@ medford_board_cfg(
 	 * stuffing.
 	 */
 	encp->enc_txq_max_ndescs = 2048;
+	encp->enc_txq_min_ndescs = EF10_TXQ_MINNDESCS;
 
 	EFX_STATIC_ASSERT(MEDFORD_PIOBUF_NBUFS <= EF10_MAX_PIOBUF_NBUFS);
 	encp->enc_piobuf_limit = MEDFORD_PIOBUF_NBUFS;
diff --git a/drivers/net/sfc/base/siena_impl.h b/drivers/net/sfc/base/siena_impl.h
index d70bbff8f..549712377 100644
--- a/drivers/net/sfc/base/siena_impl.h
+++ b/drivers/net/sfc/base/siena_impl.h
@@ -24,6 +24,9 @@ extern "C" {
 #endif
 #define	EFX_TXQ_DC_NDESCS(_dcsize)	(8 << (_dcsize))
 
+#define	SIENA_TXQ_MAXNDESCS	4096
+#define	SIENA_TXQ_MINNDESCS	512
+
 #define	SIENA_NVRAM_CHUNK 0x80
 
 
diff --git a/drivers/net/sfc/base/siena_nic.c b/drivers/net/sfc/base/siena_nic.c
index fca17171b..0f02195c0 100644
--- a/drivers/net/sfc/base/siena_nic.c
+++ b/drivers/net/sfc/base/siena_nic.c
@@ -149,7 +149,8 @@ siena_board_cfg(
 	encp->enc_rxq_limit = MIN(EFX_RXQ_LIMIT_TARGET, nrxq);
 	encp->enc_txq_limit = MIN(EFX_TXQ_LIMIT_TARGET, ntxq);
 
-	encp->enc_txq_max_ndescs = 4096;
+	encp->enc_txq_max_ndescs = SIENA_TXQ_MAXNDESCS;
+	encp->enc_txq_min_ndescs = SIENA_TXQ_MINNDESCS;
 
 	encp->enc_buftbl_limit = SIENA_SRAM_ROWS -
 	    (encp->enc_txq_limit * EFX_TXQ_DC_NDESCS(EFX_TXQ_DC_SIZE)) -
