diff options
| author | Holger Schurig <hs4233@mail.mn-solutions.de> | 2008-04-01 16:50:43 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-04-16 23:59:56 +0400 |
| commit | 7919b89c8276d657976d4d4d6b7cb58ea1aa08c3 (patch) | |
| tree | 31fc24e2f8b7d8eeee67347333e078591796d4b7 /drivers/net/wireless/libertas/tx.c | |
| parent | 98dd6a575928ed9c42130d208e6bfb0f7a914d5a (diff) | |
| download | linux-7919b89c8276d657976d4d4d6b7cb58ea1aa08c3.tar.xz | |
libertas: convert libertas driver to use an event/cmdresp queue
This patch (co-developed by Dan Williams and Holger Schurig) uses a kfifo
object for events and a swapping buffer scheme for the command response to
preserve the zero-copy semantics of the CF driver and keep memory usage low.
The main thread should only ever touch the buffer indexed by priv->resp_idx,
while the interface code is free to write to the second buffer, then swap
priv->resp_idx under the driver spinlock. The firmware specs only permit
one in-flight command, so there will only ever be one command response to
process at a time.
Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/libertas/tx.c')
| -rw-r--r-- | drivers/net/wireless/libertas/tx.c | 20 |
1 files changed, 3 insertions, 17 deletions
diff --git a/drivers/net/wireless/libertas/tx.c b/drivers/net/wireless/libertas/tx.c index 77f1f9525b81..a4972fed2941 100644 --- a/drivers/net/wireless/libertas/tx.c +++ b/drivers/net/wireless/libertas/tx.c @@ -179,31 +179,17 @@ int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) * * @returns void */ -void lbs_send_tx_feedback(struct lbs_private *priv) +void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count) { struct tx_radiotap_hdr *radiotap_hdr; - u32 status = priv->eventcause; - int txfail; - int try_count; if (!priv->monitormode || priv->currenttxskb == NULL) return; radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data; - txfail = (status >> 24); - -#if 0 - /* The version of roofnet that we've tested does not use this yet - * But it may be used in the future. - */ - if (txfail) - radiotap_hdr->flags &= IEEE80211_RADIOTAP_F_TX_FAIL; -#endif - try_count = (status >> 16) & 0xff; - radiotap_hdr->data_retries = (try_count) ? - (1 + priv->txretrycount - try_count) : 0; - + radiotap_hdr->data_retries = try_count ? + (1 + priv->txretrycount - try_count) : 0; priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb, priv->rtap_net_dev); |