[PATCH v2 RFC net-next 17/18] net: mvpp2: limit minimum ring size to 1024 descriptors

stefanc
2021-01-24T11:51:12Z

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

Signed-off-by: Stefan Chulski <stefanc@marvell.com>
---
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 03a4b36..f8fc682 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -4544,6 +4544,8 @@ 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