diff options
| -rw-r--r-- | drivers/net/wimax/i2400m/i2400m.h | 6 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/tx.c | 11 |
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/net/wimax/i2400m/i2400m.h b/drivers/net/wimax/i2400m/i2400m.h index b8c7dbfead49..1babc55b1312 100644 --- a/drivers/net/wimax/i2400m/i2400m.h +++ b/drivers/net/wimax/i2400m/i2400m.h @@ -242,6 +242,11 @@ struct i2400m_barker_db; * so we have a tx_blk_size variable that the bus layer sets to * tell the engine how much of that we need. * + * @bus_tx_room_min: [fill] Minimum room required while allocating + * TX queue's buffer space for message header. SDIO requires + * 224 bytes and USB 16 bytes. Refer bus specific driver code + * for details. + * * @bus_pl_size_max: [fill] Maximum payload size. * * @bus_setup: [optional fill] Function called by the bus-generic code @@ -573,6 +578,7 @@ struct i2400m { wait_queue_head_t state_wq; /* Woken up when on state updates */ size_t bus_tx_block_size; + size_t bus_tx_room_min; size_t bus_pl_size_max; unsigned bus_bm_retries; diff --git a/drivers/net/wimax/i2400m/tx.c b/drivers/net/wimax/i2400m/tx.c index 609f1ca6e9fc..3f819efc06b5 100644 --- a/drivers/net/wimax/i2400m/tx.c +++ b/drivers/net/wimax/i2400m/tx.c @@ -563,8 +563,17 @@ void i2400m_tx_new(struct i2400m *i2400m) struct i2400m_msg_hdr *tx_msg; bool try_head = 0; BUG_ON(i2400m->tx_msg != NULL); + /* + * In certain situations, TX queue might have enough space to + * accommodate the new message header I2400M_TX_PLD_SIZE, but + * might not have enough space to accommodate the payloads. + * Adding bus_tx_room_min padding while allocating a new TX message + * increases the possibilities of including at least one payload of the + * size <= bus_tx_room_min. + */ try_head: - tx_msg = i2400m_tx_fifo_push(i2400m, I2400M_TX_PLD_SIZE, 0, try_head); + tx_msg = i2400m_tx_fifo_push(i2400m, I2400M_TX_PLD_SIZE, + i2400m->bus_tx_room_min, try_head); if (tx_msg == NULL) goto out; else if (tx_msg == TAIL_FULL) { |