From 342934a55898f830c38f066e6776e8996589fef3 Mon Sep 17 00:00:00 2001 From: Ivan Khoronzhuk Date: Tue, 29 Nov 2016 17:00:50 +0200 Subject: [PATCH] net: ethernet: ti: cpsw: optimize end of poll cycle Check budget fullness only after it's updated and update channel mask only once to keep budget balance between channels. It's also needed for farther changes. Signed-off-by: Ivan Khoronzhuk Signed-off-by: David S. Miller --- drivers/net/ethernet/ti/cpsw.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 27379fa3d1b1..5ea2e3dba21a 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -788,19 +788,13 @@ static int cpsw_tx_poll(struct napi_struct *napi_tx, int budget) /* process every unprocessed channel */ ch_map = cpdma_ctrl_txchs_state(cpsw->dma); - for (ch = 0, num_tx = 0; num_tx < budget; ch_map >>= 1, ch++) { - if (!ch_map) { - ch_map = cpdma_ctrl_txchs_state(cpsw->dma); - if (!ch_map) - break; - - ch = 0; - } - + for (ch = 0, num_tx = 0; ch_map; ch_map >>= 1, ch++) { if (!(ch_map & 0x01)) continue; num_tx += cpdma_chan_process(cpsw->txch[ch], budget - num_tx); + if (num_tx >= budget) + break; } if (num_tx < budget) { @@ -823,19 +817,13 @@ static int cpsw_rx_poll(struct napi_struct *napi_rx, int budget) /* process every unprocessed channel */ ch_map = cpdma_ctrl_rxchs_state(cpsw->dma); - for (ch = 0, num_rx = 0; num_rx < budget; ch_map >>= 1, ch++) { - if (!ch_map) { - ch_map = cpdma_ctrl_rxchs_state(cpsw->dma); - if (!ch_map) - break; - - ch = 0; - } - + for (ch = 0, num_rx = 0; ch_map; ch_map >>= 1, ch++) { if (!(ch_map & 0x01)) continue; num_rx += cpdma_chan_process(cpsw->rxch[ch], budget - num_rx); + if (num_rx >= budget) + break; } if (num_rx < budget) { -- 2.20.1