From: Ezequiel Garcia Date: Mon, 16 May 2016 15:41:07 +0000 (-0300) Subject: stmmac: hardware TX COE doesn't work when force_thresh_dma_mode is set X-Git-Tag: v5.15~13631^2~19 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=a8df35d45800c2af2b9bac04a8f9d4e426862e4d;p=mirror_ubuntu-kernels.git stmmac: hardware TX COE doesn't work when force_thresh_dma_mode is set Commit f748be531d70 ("stmmac: support new GMAC4") reverted a previous fix by mistake. This commit re-applies said fix: commit dec2165ff38a99f937fe61875d102c6c8596c815 Author: Sonic Zhang Date: Thu Jan 22 14:55:57 2015 +0800 stmmac: hardware TX COE doesn't work when force_thresh_dma_mode is set Clear the TX COE bit when force_thresh_dma_mode is set even hardware dma capability says support. Tested on BF609. Signed-off-by: Sonic Zhang Acked-by: Giuseppe Cavallaro Signed-off-by: David S. Miller Tested on LPC4350 Hitex board. Fixes: f748be531d70 ("stmmac: support new GMAC4") Signed-off-by: Ezequiel Garcia Tested-by: Joachim Eastwood Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index fd5ab7bfdb76..eac45d0c75e2 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -3131,7 +3131,12 @@ static int stmmac_hw_init(struct stmmac_priv *priv) priv->plat->enh_desc = priv->dma_cap.enh_desc; priv->plat->pmt = priv->dma_cap.pmt_remote_wake_up; - priv->plat->tx_coe = priv->dma_cap.tx_coe; + /* TXCOE doesn't work in thresh DMA mode */ + if (priv->plat->force_thresh_dma_mode) + priv->plat->tx_coe = 0; + else + priv->plat->tx_coe = priv->dma_cap.tx_coe; + /* In case of GMAC4 rx_coe is from HW cap register. */ priv->plat->rx_coe = priv->dma_cap.rx_coe;