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net: fec: fix fec_enet_get_free_txdesc_num
authorTroy Kisky <troy.kisky@boundarydevices.com>
Fri, 5 Feb 2016 21:52:45 +0000 (14:52 -0700)
committerDavid S. Miller <davem@davemloft.net>
Thu, 11 Feb 2016 11:14:51 +0000 (06:14 -0500)
commit93c595f7b8c5fe98bd78bab5270a49c40a69f221
tree52f52fa5faa7d1d99c6a2501e52d8c29c01ced18tree | snapshot (tar.gz zip)
parent095098e194d1357a509c1d8e9a421bf825dddd2acommit | 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>
drivers/net/ethernet/freescale/fec_main.c diff | blob | blame | history