diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/kirkwood_egiga.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/kirkwood_egiga.c b/drivers/net/kirkwood_egiga.c index 932792e..ea0c522 100644 --- a/drivers/net/kirkwood_egiga.c +++ b/drivers/net/kirkwood_egiga.c @@ -447,6 +447,8 @@ static int kwgbe_init(struct eth_device *dev) /* Assignment of Rx CRDB of given RXUQ */ KWGBEREG_WR(regs->rxcdp[RXUQ], (u32) dkwgbe->p_rxdesc_curr); + /* ensure previous write is done before enabling Rx DMA */ + isb(); /* Enable port Rx. */ KWGBEREG_WR(regs->rqc, (1 << RXUQ)); @@ -536,8 +538,13 @@ static int kwgbe_send(struct eth_device *dev, volatile void *dataptr, p_txdesc->buf_ptr = (u8 *) p; p_txdesc->byte_cnt = datasize; - /* Apply send command using zeroth TXUQ */ + /* Set this tc desc as zeroth TXUQ */ KWGBEREG_WR(regs->tcqdp[TXUQ], (u32) p_txdesc); + + /* ensure tx desc writes above are performed before we start Tx DMA */ + isb(); + + /* Apply send command using zeroth TXUQ */ KWGBEREG_WR(regs->tqc, (1 << TXUQ)); /* |