mISDN: remove unnecessary variable assignments

Remove unnecessary variable assignments.

Addresses-Coverity-ID: 1226917
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/isdn/hardware/mISDN/mISDNipac.c

@@ -364,7 +364,7 @@ isac_mos_irq(struct isac_hw *isac)
 			WriteISAC(isac, ISAC_MOCR, isac->mocr);
 			if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) {
 				if (isac->monitor)
-					ret = isac->monitor(isac->dch.hw,
+					isac->monitor(isac->dch.hw,
 						      MONITOR_TX_0, NULL, 0);
 			}
 			kfree(isac->mon_tx);
@@ -375,7 +375,7 @@ isac_mos_irq(struct isac_hw *isac)
 		}
 		if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) {
 			if (isac->monitor)
-				ret = isac->monitor(isac->dch.hw,
+				isac->monitor(isac->dch.hw,
 					      MONITOR_TX_0, NULL, 0);
 			kfree(isac->mon_tx);
 			isac->mon_tx = NULL;
@@ -397,7 +397,7 @@ isac_mos_irq(struct isac_hw *isac)
 			WriteISAC(isac, ISAC_MOCR, isac->mocr);
 			if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) {
 				if (isac->monitor)
-					ret = isac->monitor(isac->dch.hw,
+					isac->monitor(isac->dch.hw,
 						      MONITOR_TX_1, NULL, 0);
 			}
 			kfree(isac->mon_tx);
@@ -408,7 +408,7 @@ isac_mos_irq(struct isac_hw *isac)
 		}
 		if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) {
 			if (isac->monitor)
-				ret = isac->monitor(isac->dch.hw,
+				isac->monitor(isac->dch.hw,
 					      MONITOR_TX_1, NULL, 0);
 			kfree(isac->mon_tx);
 			isac->mon_tx = NULL;