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| author | Ricardo Ribalda <ricardo.ribalda@gmail.com> | 2013-10-01 08:17:10 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-13 14:51:07 -0700 |
| commit | 67a8bceeb8f58b365104b0b35285205bff488727 (patch) | |
| tree | 960aa160e3cddec43f4a9afc6c9f15b061af0e2e /drivers | |
| parent | dbe48e5b8c4f5f3096102d98cc53441178e67aa2 (diff) | |
| download | kernel_samsung_smdk4412-67a8bceeb8f58b365104b0b35285205bff488727.zip kernel_samsung_smdk4412-67a8bceeb8f58b365104b0b35285205bff488727.tar.gz kernel_samsung_smdk4412-67a8bceeb8f58b365104b0b35285205bff488727.tar.bz2 | |
ll_temac: Reset dma descriptors indexes on ndo_open
[ Upstream commit 7167cf0e8cd10287b7912b9ffcccd9616f382922 ]
The dma descriptors indexes are only initialized on the probe function.
If a packet is on the buffer when temac_stop is called, the dma
descriptors indexes can be left on a incorrect state where no other
package can be sent.
So an interface could be left in an usable state after ifdow/ifup.
This patch makes sure that the descriptors indexes are in a proper
status when the device is open.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ll_temac_main.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ll_temac_main.c b/drivers/net/ll_temac_main.c index b7948cc..7ebb4c1 100644 --- a/drivers/net/ll_temac_main.c +++ b/drivers/net/ll_temac_main.c @@ -302,6 +302,12 @@ static int temac_dma_bd_init(struct net_device *ndev) lp->rx_bd_p + (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1))); lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p); + /* Init descriptor indexes */ + lp->tx_bd_ci = 0; + lp->tx_bd_next = 0; + lp->tx_bd_tail = 0; + lp->rx_bd_ci = 0; + return 0; out: |