diff options
Diffstat (limited to 'drivers/net/ethernet/cadence/macb_main.c')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_main.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 1d86b4d5645a..dfaefe91b96a 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -61,7 +61,8 @@ #define MACB_TX_ERR_FLAGS (MACB_BIT(ISR_TUND) \ | MACB_BIT(ISR_RLE) \ | MACB_BIT(TXERR)) -#define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP)) +#define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP) \ + | MACB_BIT(TXUBR)) /* Max length of transmit frame must be a multiple of 8 bytes */ #define MACB_TX_LEN_ALIGN 8 @@ -1312,6 +1313,21 @@ static void macb_hresp_error_task(unsigned long data) netif_tx_start_all_queues(dev); } +static void macb_tx_restart(struct macb_queue *queue) +{ + unsigned int head = queue->tx_head; + unsigned int tail = queue->tx_tail; + struct macb *bp = queue->bp; + + if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) + queue_writel(queue, ISR, MACB_BIT(TXUBR)); + + if (head == tail) + return; + + macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); +} + static irqreturn_t macb_interrupt(int irq, void *dev_id) { struct macb_queue *queue = dev_id; @@ -1369,6 +1385,9 @@ static irqreturn_t macb_interrupt(int irq, void *dev_id) if (status & MACB_BIT(TCOMP)) macb_tx_interrupt(queue); + if (status & MACB_BIT(TXUBR)) + macb_tx_restart(queue); + /* Link change detection isn't possible with RMII, so we'll * add that if/when we get our hands on a full-blown MII PHY. */ |