diff options
| author | Giuseppe Cavallaro | 2016-02-29 14:27:32 +0100 |
|---|---|---|
| committer | David S. Miller | 2016-03-02 20:21:31 +0100 |
| commit | 2a6d8e172639b49a81afc76140dd7ee7c9a24da1 (patch) | |
| tree | e6a4c565ea3239542bf26a7c0206095fdce2124e /drivers/net/ethernet/stmicro/stmmac/chain_mode.c | |
| parent | stmmac: add length field to dma data (diff) | |
| download | kernel-qcow2-linux-2a6d8e172639b49a81afc76140dd7ee7c9a24da1.tar.gz kernel-qcow2-linux-2a6d8e172639b49a81afc76140dd7ee7c9a24da1.tar.xz kernel-qcow2-linux-2a6d8e172639b49a81afc76140dd7ee7c9a24da1.zip | |
stmmac: add last_segment field to dma data
last_segment field is read twice from dma descriptors in stmmac_clean().
Add last_segment to dma data so that this flag is from priv
structure in cache instead of memory.
It avoids reading twice from memory for each loop in stmmac_clean().
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/chain_mode.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/chain_mode.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/chain_mode.c b/drivers/net/ethernet/stmicro/stmmac/chain_mode.c index 7fa7ab0d90bc..355eafb5d6c7 100644 --- a/drivers/net/ethernet/stmicro/stmmac/chain_mode.c +++ b/drivers/net/ethernet/stmicro/stmmac/chain_mode.c @@ -150,8 +150,9 @@ static void stmmac_refill_desc3(void *priv_ptr, struct dma_desc *p) static void stmmac_clean_desc3(void *priv_ptr, struct dma_desc *p) { struct stmmac_priv *priv = (struct stmmac_priv *)priv_ptr; + unsigned int entry = priv->dirty_tx; - if (priv->hw->desc->get_tx_ls(p) && !priv->extend_desc) + if (priv->tx_skbuff_dma[entry].last_segment && !priv->extend_desc) /* NOTE: Device will overwrite des3 with timestamp value if * 1588-2002 time stamping is enabled, hence reinitialize it * to keep explicit chaining in the descriptor. |