mISDN: Implement MISDN_CTRL_RX_OFF for more drivers
MISDN_CTRL_RX_OFF is a meachanism to discard RX data in the driver if
the data is not needed by the application. It can be used when playing
mesages, but not recording or with unidirectional protocols.
Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/hardware/mISDN/mISDNisar.c b/drivers/isdn/hardware/mISDN/mISDNisar.c
index 901be32..be5973d 100644
--- a/drivers/isdn/hardware/mISDN/mISDNisar.c
+++ b/drivers/isdn/hardware/mISDN/mISDNisar.c
@@ -429,6 +429,11 @@
ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
return;
}
+ if (test_bit(FLG_RX_OFF, &ch->bch.Flags)) {
+ ch->bch.dropcnt += ch->is->clsb;
+ ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
+ return;
+ }
switch (ch->bch.state) {
case ISDN_P_NONE:
pr_debug("%s: ISAR protocol 0 spurious IIS_RDATA %x/%x/%x\n",