# \[PATCH v6 net-next 17/18\] net: mvpp2: limit minimum ring size to 1024 descriptors

- From: \<hidden\>
- Date: 2021-01-31 11:05:12 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/01/6252906
- Thread: https://ratatoskr.run/netdev/2021/01/6252901/t.md

```text
From: Stefan Chulski <redacted>

To support Flow Control ring size should be at least 1024 descriptors.

Signed-off-by: Stefan Chulski <redacted>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 7632810..98849b0 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -4543,6 +4543,8 @@ static int mvpp2_check_ringparam_valid(struct net_device *dev,
 
 	if (ring->rx_pending > MVPP2_MAX_RXD_MAX)
 		new_rx_pending = MVPP2_MAX_RXD_MAX;
+	else if (ring->rx_pending < MSS_THRESHOLD_START)
+		new_rx_pending = MSS_THRESHOLD_START;
 	else if (!IS_ALIGNED(ring->rx_pending, 16))
 		new_rx_pending = ALIGN(ring->rx_pending, 16);
 
-- 
1.9.1

```