diff options
| author | Robert Hancock <robert.hancock@calian.com> | 2022-01-18 15:41:28 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 11:05:33 +0100 |
| commit | b9d67f0a6dc06be8a93e673c5c88a3d51006e42f (patch) | |
| tree | 12e249999fadec77c79dbb4afa40064d26bc210b /drivers/net/ethernet/xilinx | |
| parent | e8893b1f8899b6fa161b83ee93e8cc04e17df1e6 (diff) | |
net: axienet: limit minimum TX ring size
commit 70f5817deddbc6ef3faa35841cab83c280cc653a upstream.
The driver will not work properly if the TX ring size is set to below
MAX_SKB_FRAGS + 1 since it needs to hold at least one full maximally
fragmented packet in the TX ring. Limit setting the ring size to below
this value.
Fixes: 8b09ca823ffb4 ("net: axienet: Make RX/TX ring sizes configurable")
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/ethernet/xilinx')
| -rw-r--r-- | drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index c4f1775696e6..cc3c9eb9c4cc 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -43,6 +43,7 @@ /* Descriptors defines for Tx and Rx DMA */ #define TX_BD_NUM_DEFAULT 64 #define RX_BD_NUM_DEFAULT 1024 +#define TX_BD_NUM_MIN (MAX_SKB_FRAGS + 1) #define TX_BD_NUM_MAX 4096 #define RX_BD_NUM_MAX 4096 @@ -1364,7 +1365,8 @@ static int axienet_ethtools_set_ringparam(struct net_device *ndev, if (ering->rx_pending > RX_BD_NUM_MAX || ering->rx_mini_pending || ering->rx_jumbo_pending || - ering->rx_pending > TX_BD_NUM_MAX) + ering->tx_pending < TX_BD_NUM_MIN || + ering->tx_pending > TX_BD_NUM_MAX) return -EINVAL; if (netif_running(ndev)) |