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mISDN: Early confirm for transparent data

Selaa lähdekoodia 
It is better to send a confirm for transparent data early as possible
to avoid TX underuns.

Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Keil
2012-05-15 23:51:02 +00:00
committed by David S. Miller
vanhempi 1368112c07
commit 8bfddfbe21
10 muutettua tiedostoa jossa 43 lisäystä ja 118 poistoa
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21
drivers/isdn/hardware/mISDN/netjet.c
Näytä tiedosto

@@ -595,15 +595,11 @@ fill_dma(struct tiger_ch *bc)
static int
bc_next_frame(struct tiger_ch *bc)
{
if (bc->bch.tx_skb && bc->bch.tx_idx < bc->bch.tx_skb->len)
if (bc->bch.tx_skb && bc->bch.tx_idx < bc->bch.tx_skb->len) {
fill_dma(bc);
else {
if (bc->bch.tx_skb) {
/* send confirm, on trans, free on hdlc. */
if (test_bit(FLG_TRANSPARENT, &bc->bch.Flags))
confirm_Bsend(&bc->bch);
} else {
if (bc->bch.tx_skb)
dev_kfree_skb(bc->bch.tx_skb);
}
if (get_next_bframe(&bc->bch))
fill_dma(bc);
else
@@ -732,22 +728,17 @@ nj_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
struct tiger_ch *bc = container_of(bch, struct tiger_ch, bch);
struct tiger_hw *card = bch->hw;
struct mISDNhead *hh = mISDN_HEAD_P(skb);
u32 id;
u_long flags;
unsigned long flags;
switch (hh->prim) {
case PH_DATA_REQ:
spin_lock_irqsave(&card->lock, flags);
ret = bchannel_senddata(bch, skb);
if (ret > 0) { /* direct TX */
id = hh->id; /* skb can be freed */
fill_dma(bc);
ret = 0;
spin_unlock_irqrestore(&card->lock, flags);
if (!test_bit(FLG_TRANSPARENT, &bch->Flags))
queue_ch_frame(ch, PH_DATA_CNF, id, NULL);
} else
spin_unlock_irqrestore(&card->lock, flags);
}
spin_unlock_irqrestore(&card->lock, flags);
return ret;
case PH_ACTIVATE_REQ:
spin_lock_irqsave(&card->lock, flags);