mISDN: Allow to set a minimum length for transparent data

If the FIFO of the card is small, many short messages are queued up to
the upper layers and the userspace. This change allows the applications
to set a minimum datalen they want from the drivers.
Create a common control function to avoid code duplication in each
driver.

Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 19 deletions

diff --git a/drivers/isdn/hardware/mISDN/w6692.c b/drivers/isdn/hardware/mISDN/w6692.c
index 8324b20c7f16..03fb4a34fd53 100644
--- a/drivers/isdn/hardware/mISDN/w6692.c
+++ b/drivers/isdn/hardware/mISDN/w6692.c
@@ -688,7 +688,7 @@ W6692B_interrupt(struct w6692_hw *card, int ch)
                         if (count == 0)
                                 count = W_B_FIFO_THRESH;
                         W6692_empty_Bfifo(wch, count);
-                        recv_Bchannel(&wch->bch, 0);
+                        recv_Bchannel(&wch->bch, 0, false);
                 }
         }
         if (stat & W_B_EXI_RMR) {
@@ -704,9 +704,8 @@ W6692B_interrupt(struct w6692_hw *card, int ch)
                                     W_B_CMDR_RRST | W_B_CMDR_RACT);
                 } else {
                         W6692_empty_Bfifo(wch, W_B_FIFO_THRESH);
-                        if (test_bit(FLG_TRANSPARENT, &wch->bch.Flags) &&
-                            wch->bch.rx_skb && (wch->bch.rx_skb->len > 0))
-                                recv_Bchannel(&wch->bch, 0);
+                        if (test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
+                                recv_Bchannel(&wch->bch, 0, false);
                 }
         }
         if (stat & W_B_EXI_RDOV) {
@@ -979,20 +978,7 @@ w6692_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
 static int
 channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
 {
-        int     ret = 0;
-
-        switch (cq->op) {
-        case MISDN_CTRL_GETOP:
-                cq->op = 0;
-                break;
-                /* Nothing implemented yet */
-        case MISDN_CTRL_FILL_EMPTY:
-        default:
-                pr_info("%s: unknown Op %x\n", __func__, cq->op);
-                ret = -EINVAL;
-                break;
-        }
-        return ret;
+        return mISDN_ctrl_bchannel(bch, cq);
 }
 
 static int
@@ -1303,7 +1289,8 @@ setup_instance(struct w6692_hw *card)
         card->dch.hw = card;
         card->dch.dev.nrbchan = 2;
         for (i = 0; i < 2; i++) {
-                mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM);
+                mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM,
+                                   W_B_FIFO_THRESH);
                 card->bc[i].bch.hw = card;
                 card->bc[i].bch.nr = i + 1;
                 card->bc[i].bch.ch.nr = i + 1;