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authorGiuseppe Cavallaro2016-02-29 14:27:32 +0100
committerDavid S. Miller2016-03-02 20:21:31 +0100
commit2a6d8e172639b49a81afc76140dd7ee7c9a24da1 (patch)
treee6a4c565ea3239542bf26a7c0206095fdce2124e /drivers/net/ethernet/stmicro/stmmac/chain_mode.c
parentstmmac: add length field to dma data (diff)
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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.c3
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.