From 26c7945a24b8bd5565e9b1481dac10ff14eca177 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 10 Dec 2015 15:42:01 +0100 Subject: [PATCH] net: emaclite: Fix logic around available TX buffers Simplify logic how to find out if there is free TX buffer. Both buffers are checked all the time that's why logic around order can be removed. Also add check when only one buffer is available. Signed-off-by: Michal Simek Acked-by: Joe Hershberger --- drivers/net/xilinx_emaclite.c | 24 ++++++++---------------- 1 file changed, 8 insertions(+), 16 deletions(-) diff --git a/drivers/net/xilinx_emaclite.c b/drivers/net/xilinx_emaclite.c index 72b6e0ac42..b0c26354e2 100644 --- a/drivers/net/xilinx_emaclite.c +++ b/drivers/net/xilinx_emaclite.c @@ -379,28 +379,20 @@ static int emaclite_init(struct eth_device *dev, bd_t *bis) return 0; } -static int xemaclite_txbufferavailable(struct eth_device *dev) +static int xemaclite_txbufferavailable(struct xemaclite *emaclite) { - u32 reg; - u32 txpingbusy; - u32 txpongbusy; - struct xemaclite *emaclite = dev->priv; + u32 tmp; + struct emaclite_regs *regs = emaclite->regs; /* * Read the other buffer register * and determine if the other buffer is available */ - reg = in_be32 (dev->iobase + - emaclite->nexttxbuffertouse + 0); - txpingbusy = ((reg & XEL_TSR_XMIT_BUSY_MASK) == - XEL_TSR_XMIT_BUSY_MASK); - - reg = in_be32 (dev->iobase + - (emaclite->nexttxbuffertouse ^ XEL_TSR_OFFSET) + 0); - txpongbusy = ((reg & XEL_TSR_XMIT_BUSY_MASK) == - XEL_TSR_XMIT_BUSY_MASK); + tmp = ~in_be32(®s->tx_ping_tsr); + if (emaclite->txpp) + tmp |= ~in_be32(®s->tx_pong_tsr); - return !(txpingbusy && txpongbusy); + return !(tmp & XEL_TSR_XMIT_BUSY_MASK); } static int emaclite_send(struct eth_device *dev, void *ptr, int len) @@ -415,7 +407,7 @@ static int emaclite_send(struct eth_device *dev, void *ptr, int len) if (len > PKTSIZE) len = PKTSIZE; - while (!xemaclite_txbufferavailable(dev) && maxtry) { + while (xemaclite_txbufferavailable(emaclite) && maxtry) { udelay(10); maxtry--; } -- 2.39.5