--- zzzz-none-000/linux-3.10.107/drivers/isdn/hisax/elsa_ser.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/isdn/hisax/elsa_ser.c	2021-02-04 17:41:59.000000000 +0000
@@ -344,7 +344,7 @@
 
 		t += sprintf(t, "modem read cnt %d", cs->hw.elsa.rcvcnt);
 		QuickHex(t, cs->hw.elsa.rcvbuf, cs->hw.elsa.rcvcnt);
-		debugl1(cs, tmp);
+		debugl1(cs, "%s", tmp);
 	}
 	cs->hw.elsa.rcvcnt = 0;
 }
@@ -573,7 +573,8 @@
 		test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
 		bcs->cs->dc.isac.arcofi_bc = st->l1.bc;
 		arcofi_fsm(bcs->cs, ARCOFI_START, &ARCOFI_XOP_0);
-		interruptible_sleep_on(&bcs->cs->dc.isac.arcofi_wait);
+		wait_event_interruptible(bcs->cs->dc.isac.arcofi_wait,
+				 bcs->cs->dc.isac.arcofi_state == ARCOFI_NOP);
 		bcs->cs->hw.elsa.MFlag = 1;
 	} else {
 		printk(KERN_WARNING "ElsaSer: unknown pr %x\n", pr);