net: mvpp2: check ethtool sets the Tx ring size is to a valid min value
authorAntoine Tenart <antoine.tenart@free-electrons.com>
Tue, 28 Nov 2017 13:19:51 +0000 (14:19 +0100)
committerDavid S. Miller <davem@davemloft.net>
Tue, 28 Nov 2017 15:09:51 +0000 (10:09 -0500)
commit76e583c5f50ef539caea6935d37af3595034befb
treefeeb2fcd6ff42b87077df648ae6f82f09c48a386
parente749aca84b10f3987b2ee1f76e0c7d8aacc5653c
net: mvpp2: check ethtool sets the Tx ring size is to a valid min value

This patch fixes the Tx ring size checks when using ethtool, by adding
an extra check in the PPv2 check_ringparam_valid helper. The Tx ring
size cannot be set to a value smaller than the minimum number of
descriptors needed for TSO.

Fixes: 1d17db08c056 ("net: mvpp2: limit TSO segments and use stop/wake thresholds")
Suggested-by: Yan Markman <ymarkman@marvell.com>
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/marvell/mvpp2.c