diff options
| author | Troy Kisky <troy.kisky@boundarydevices.com> | 2016-02-05 14:52:45 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-11 06:14:51 -0500 |
| commit | 93c595f7b8c5fe98bd78bab5270a49c40a69f221 (patch) | |
| tree | 52f52fa5faa7d1d99c6a2501e52d8c29c01ced18 /drivers/net/ethernet/freescale/fec_main.c | |
| parent | 095098e194d1357a509c1d8e9a421bf825dddd2a (diff) | |
net: fec: fix fec_enet_get_free_txdesc_num
When first initialized, cur_tx points to the 1st
entry in the queue, and dirty_tx points to the last.
At this point, fec_enet_get_free_txdesc_num will
return tx_ring_size -2. If tx_ring_size -2 entries
are now queued, then fec_enet_get_free_txdesc_num
should return 0, but it returns tx_ring_size instead.
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/freescale/fec_main.c')
| -rw-r--r-- | drivers/net/ethernet/freescale/fec_main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 162fa59e3eae..adbddfdb5474 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -296,7 +296,7 @@ static int fec_enet_get_free_txdesc_num(struct fec_enet_private *fep, entries = ((const char *)txq->dirty_tx - (const char *)txq->cur_tx) / fep->bufdesc_size - 1; - return entries > 0 ? entries : entries + txq->tx_ring_size; + return entries >= 0 ? entries : entries + txq->tx_ring_size; } static void swap_buffer(void *bufaddr, int len) |