diff options
Diffstat (limited to 'drivers/nfc/trf7970a.c')
| -rw-r--r-- | drivers/nfc/trf7970a.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index 00fb2cee6790..8b109e15687f 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -132,6 +132,7 @@ /* TX length is 3 nibbles long ==> 4KB - 1 bytes max */ #define TRF7970A_TX_MAX (4096 - 1) +#define TRF7970A_WAIT_FOR_TX_IRQ 20 #define TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT 20 #define TRF7970A_WAIT_FOR_FIFO_DRAIN_TIMEOUT 20 #define TRF7970A_WAIT_TO_ISSUE_ISO15693_EOF 40 @@ -555,7 +556,11 @@ static int trf7970a_transmit(struct trf7970a *trf, struct sk_buff *skb, timeout = TRF7970A_WAIT_TO_ISSUE_ISO15693_EOF; } else { trf->state = TRF7970A_ST_WAIT_FOR_RX_DATA; - timeout = trf->timeout; + + if (!trf->timeout) + timeout = TRF7970A_WAIT_FOR_TX_IRQ; + else + timeout = trf->timeout; } } @@ -754,6 +759,14 @@ static irqreturn_t trf7970a_irq(int irq, void *dev_id) trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET); } else if (status == TRF7970A_IRQ_STATUS_TX) { trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET); + + if (!trf->timeout) { + trf->ignore_timeout = !cancel_delayed_work( + &trf->timeout_work); + trf->rx_skb = ERR_PTR(0); + trf7970a_send_upstream(trf); + break; + } } else { trf7970a_send_err_upstream(trf, -EIO); } @@ -1253,12 +1266,14 @@ static int trf7970a_in_send_cmd(struct nfc_digital_dev *ddev, goto out_err; } - trf->rx_skb = nfc_alloc_recv_skb(TRF7970A_RX_SKB_ALLOC_SIZE, - GFP_KERNEL); - if (!trf->rx_skb) { - dev_dbg(trf->dev, "Can't alloc rx_skb\n"); - ret = -ENOMEM; - goto out_err; + if (timeout) { + trf->rx_skb = nfc_alloc_recv_skb(TRF7970A_RX_SKB_ALLOC_SIZE, + GFP_KERNEL); + if (!trf->rx_skb) { + dev_dbg(trf->dev, "Can't alloc rx_skb\n"); + ret = -ENOMEM; + goto out_err; + } } if (trf->state == TRF7970A_ST_IDLE_RX_BLOCKED) { |