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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/tty/amiserial.c
..
..
@@ -22,17 +22,7 @@
22
22
  *
23
23
  */
24
24
 
25
-/*
26
- * Serial driver configuration section.  Here are the various options:
27
- *
28
- * SERIAL_PARANOIA_CHECK
29
- * 		Check the magic number for the async_structure where
30
- * 		ever possible.
31
- */
32
-
33
25
 #include <linux/delay.h>
34
-
35
-#undef SERIAL_PARANOIA_CHECK
36
26
 
37
27
 /* Set of debugging defines */
38
28
 
..
..
@@ -132,28 +122,6 @@
132
122
 
133
123
 #define serial_isroot()	(capable(CAP_SYS_ADMIN))
134
124
 
135
-
136
-static inline int serial_paranoia_check(struct serial_state *info,
137
-					char *name, const char *routine)
138
-{
139
-#ifdef SERIAL_PARANOIA_CHECK
140
-	static const char *badmagic =
141
-		"Warning: bad magic number for serial struct (%s) in %s\n";
142
-	static const char *badinfo =
143
-		"Warning: null async_struct for (%s) in %s\n";
144
-
145
-	if (!info) {
146
-		printk(badinfo, name, routine);
147
-		return 1;
148
-	}
149
-	if (info->magic != SERIAL_MAGIC) {
150
-		printk(badmagic, name, routine);
151
-		return 1;
152
-	}
153
-#endif
154
-	return 0;
155
-}
156
-
157
125
 /* some serial hardware definitions */
158
126
 #define SDR_OVRUN   (1<<15)
159
127
 #define SDR_RBF     (1<<14)
..
..
@@ -189,9 +157,6 @@
189
157
 	struct serial_state *info = tty->driver_data;
190
158
 	unsigned long flags;
191
159
 
192
-	if (serial_paranoia_check(info, tty->name, "rs_stop"))
193
-		return;
194
-
195
160
 	local_irq_save(flags);
196
161
 	if (info->IER & UART_IER_THRI) {
197
162
 		info->IER &= ~UART_IER_THRI;
..
..
@@ -208,9 +173,6 @@
208
173
 {
209
174
 	struct serial_state *info = tty->driver_data;
210
175
 	unsigned long flags;
211
-
212
-	if (serial_paranoia_check(info, tty->name, "rs_start"))
213
-		return;
214
176
 
215
177
 	local_irq_save(flags);
216
178
 	if (info->xmit.head != info->xmit.tail
..
..
@@ -783,9 +745,6 @@
783
745
 
784
746
 	info = tty->driver_data;
785
747
 
786
-	if (serial_paranoia_check(info, tty->name, "rs_put_char"))
787
-		return 0;
788
-
789
748
 	if (!info->xmit.buf)
790
749
 		return 0;
791
750
 
..
..
@@ -808,9 +767,6 @@
808
767
 	struct serial_state *info = tty->driver_data;
809
768
 	unsigned long flags;
810
769
 
811
-	if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
812
-		return;
813
-
814
770
 	if (info->xmit.head == info->xmit.tail
815
771
 	    || tty->stopped
816
772
 	    || tty->hw_stopped
..
..
@@ -832,9 +788,6 @@
832
788
 	int	c, ret = 0;
833
789
 	struct serial_state *info = tty->driver_data;
834
790
 	unsigned long flags;
835
-
836
-	if (serial_paranoia_check(info, tty->name, "rs_write"))
837
-		return 0;
838
791
 
839
792
 	if (!info->xmit.buf)
840
793
 		return 0;
..
..
@@ -878,8 +831,6 @@
878
831
 {
879
832
 	struct serial_state *info = tty->driver_data;
880
833
 
881
-	if (serial_paranoia_check(info, tty->name, "rs_write_room"))
882
-		return 0;
883
834
 	return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
884
835
 }
885
836
 
..
..
@@ -887,8 +838,6 @@
887
838
 {
888
839
 	struct serial_state *info = tty->driver_data;
889
840
 
890
-	if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
891
-		return 0;
892
841
 	return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
893
842
 }
894
843
 
..
..
@@ -897,8 +846,6 @@
897
846
 	struct serial_state *info = tty->driver_data;
898
847
 	unsigned long flags;
899
848
 
900
-	if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
901
-		return;
902
849
 	local_irq_save(flags);
903
850
 	info->xmit.head = info->xmit.tail = 0;
904
851
 	local_irq_restore(flags);
..
..
@@ -913,9 +860,6 @@
913
860
 {
914
861
 	struct serial_state *info = tty->driver_data;
915
862
         unsigned long flags;
916
-
917
-	if (serial_paranoia_check(info, tty->name, "rs_send_xchar"))
918
-		return;
919
863
 
920
864
 	info->x_char = ch;
921
865
 	if (ch) {
..
..
@@ -952,9 +896,6 @@
952
896
 	printk("throttle %s ....\n", tty_name(tty));
953
897
 #endif
954
898
 
955
-	if (serial_paranoia_check(info, tty->name, "rs_throttle"))
956
-		return;
957
-
958
899
 	if (I_IXOFF(tty))
959
900
 		rs_send_xchar(tty, STOP_CHAR(tty));
960
901
 
..
..
@@ -973,9 +914,6 @@
973
914
 #ifdef SERIAL_DEBUG_THROTTLE
974
915
 	printk("unthrottle %s ....\n", tty_name(tty));
975
916
 #endif
976
-
977
-	if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
978
-		return;
979
917
 
980
918
 	if (I_IXOFF(tty)) {
981
919
 		if (info->x_char)
..
..
@@ -996,63 +934,56 @@
996
934
  * ------------------------------------------------------------
997
935
  */
998
936
 
999
-static int get_serial_info(struct tty_struct *tty, struct serial_state *state,
1000
-			   struct serial_struct __user * retinfo)
937
+static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)
1001
938
 {
1002
-	struct serial_struct tmp;
1003
-   
1004
-	memset(&tmp, 0, sizeof(tmp));
939
+	struct serial_state *state = tty->driver_data;
940
+
1005
941
 	tty_lock(tty);
1006
-	tmp.line = tty->index;
1007
-	tmp.port = state->port;
1008
-	tmp.flags = state->tport.flags;
1009
-	tmp.xmit_fifo_size = state->xmit_fifo_size;
1010
-	tmp.baud_base = state->baud_base;
1011
-	tmp.close_delay = state->tport.close_delay;
1012
-	tmp.closing_wait = state->tport.closing_wait;
1013
-	tmp.custom_divisor = state->custom_divisor;
942
+	ss->line = tty->index;
943
+	ss->port = state->port;
944
+	ss->flags = state->tport.flags;
945
+	ss->xmit_fifo_size = state->xmit_fifo_size;
946
+	ss->baud_base = state->baud_base;
947
+	ss->close_delay = state->tport.close_delay;
948
+	ss->closing_wait = state->tport.closing_wait;
949
+	ss->custom_divisor = state->custom_divisor;
1014
950
 	tty_unlock(tty);
1015
-	if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
1016
-		return -EFAULT;
1017
951
 	return 0;
1018
952
 }
1019
953
 
1020
-static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
1021
-			   struct serial_struct __user * new_info)
954
+static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
1022
955
 {
956
+	struct serial_state *state = tty->driver_data;
1023
957
 	struct tty_port *port = &state->tport;
1024
-	struct serial_struct new_serial;
1025
958
 	bool change_spd;
1026
959
 	int 			retval = 0;
1027
960
 
1028
-	if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
1029
-		return -EFAULT;
1030
-
1031
961
 	tty_lock(tty);
1032
-	change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) ||
1033
-		new_serial.custom_divisor != state->custom_divisor;
1034
-	if (new_serial.irq || new_serial.port != state->port ||
1035
-			new_serial.xmit_fifo_size != state->xmit_fifo_size) {
962
+	change_spd = ((ss->flags ^ port->flags) & ASYNC_SPD_MASK) ||
963
+		ss->custom_divisor != state->custom_divisor;
964
+	if (ss->irq || ss->port != state->port ||
965
+			ss->xmit_fifo_size != state->xmit_fifo_size) {
1036
966
 		tty_unlock(tty);
1037
967
 		return -EINVAL;
1038
968
 	}
1039
969
   
1040
970
 	if (!serial_isroot()) {
1041
-		if ((new_serial.baud_base != state->baud_base) ||
1042
-		    (new_serial.close_delay != port->close_delay) ||
1043
-		    (new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
1044
-		    ((new_serial.flags & ~ASYNC_USR_MASK) !=
971
+		if ((ss->baud_base != state->baud_base) ||
972
+		    (ss->close_delay != port->close_delay) ||
973
+		    (ss->closing_wait != port->closing_wait) ||
974
+		    (ss->xmit_fifo_size != state->xmit_fifo_size) ||
975
+		    ((ss->flags & ~ASYNC_USR_MASK) !=
1045
976
 		     (port->flags & ~ASYNC_USR_MASK))) {
1046
977
 			tty_unlock(tty);
1047
978
 			return -EPERM;
1048
979
 		}
1049
980
 		port->flags = ((port->flags & ~ASYNC_USR_MASK) |
1050
-			       (new_serial.flags & ASYNC_USR_MASK));
1051
-		state->custom_divisor = new_serial.custom_divisor;
981
+			       (ss->flags & ASYNC_USR_MASK));
982
+		state->custom_divisor = ss->custom_divisor;
1052
983
 		goto check_and_exit;
1053
984
 	}
1054
985
 
1055
-	if (new_serial.baud_base < 9600) {
986
+	if (ss->baud_base < 9600) {
1056
987
 		tty_unlock(tty);
1057
988
 		return -EINVAL;
1058
989
 	}
..
..
@@ -1062,19 +993,19 @@
1062
993
 	 * At this point, we start making changes.....
1063
994
 	 */
1064
995
 
1065
-	state->baud_base = new_serial.baud_base;
996
+	state->baud_base = ss->baud_base;
1066
997
 	port->flags = ((port->flags & ~ASYNC_FLAGS) |
1067
-			(new_serial.flags & ASYNC_FLAGS));
1068
-	state->custom_divisor = new_serial.custom_divisor;
1069
-	port->close_delay = new_serial.close_delay * HZ/100;
1070
-	port->closing_wait = new_serial.closing_wait * HZ/100;
998
+			(ss->flags & ASYNC_FLAGS));
999
+	state->custom_divisor = ss->custom_divisor;
1000
+	port->close_delay = ss->close_delay * HZ/100;
1001
+	port->closing_wait = ss->closing_wait * HZ/100;
1071
1002
 	port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1072
1003
 
1073
1004
 check_and_exit:
1074
1005
 	if (tty_port_initialized(port)) {
1075
1006
 		if (change_spd) {
1076
1007
 			/* warn about deprecation unless clearing */
1077
-			if (new_serial.flags & ASYNC_SPD_MASK)
1008
+			if (ss->flags & ASYNC_SPD_MASK)
1078
1009
 				dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");
1079
1010
 			change_speed(tty, state, NULL);
1080
1011
 		}
..
..
@@ -1083,7 +1014,6 @@
1083
1014
 	tty_unlock(tty);
1084
1015
 	return retval;
1085
1016
 }
1086
-
1087
1017
 
1088
1018
 /*
1089
1019
  * get_lsr_info - get line status register info
..
..
@@ -1118,8 +1048,6 @@
1118
1048
 	unsigned char control, status;
1119
1049
 	unsigned long flags;
1120
1050
 
1121
-	if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1122
-		return -ENODEV;
1123
1051
 	if (tty_io_error(tty))
1124
1052
 		return -EIO;
1125
1053
 
..
..
@@ -1140,8 +1068,6 @@
1140
1068
 	struct serial_state *info = tty->driver_data;
1141
1069
 	unsigned long flags;
1142
1070
 
1143
-	if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1144
-		return -ENODEV;
1145
1071
 	if (tty_io_error(tty))
1146
1072
 		return -EIO;
1147
1073
 
..
..
@@ -1164,11 +1090,7 @@
1164
1090
  */
1165
1091
 static int rs_break(struct tty_struct *tty, int break_state)
1166
1092
 {
1167
-	struct serial_state *info = tty->driver_data;
1168
1093
 	unsigned long flags;
1169
-
1170
-	if (serial_paranoia_check(info, tty->name, "rs_break"))
1171
-		return -EINVAL;
1172
1094
 
1173
1095
 	local_irq_save(flags);
1174
1096
 	if (break_state == -1)
..
..
@@ -1221,32 +1143,18 @@
1221
1143
 	DEFINE_WAIT(wait);
1222
1144
 	int ret;
1223
1145
 
1224
-	if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1225
-		return -ENODEV;
1226
-
1227
-	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1228
-	    (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
1146
+	if ((cmd != TIOCSERCONFIG) &&
1229
1147
 	    (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1230
1148
 		if (tty_io_error(tty))
1231
1149
 		    return -EIO;
1232
1150
 	}
1233
1151
 
1234
1152
 	switch (cmd) {
1235
-		case TIOCGSERIAL:
1236
-			return get_serial_info(tty, info, argp);
1237
-		case TIOCSSERIAL:
1238
-			return set_serial_info(tty, info, argp);
1239
1153
 		case TIOCSERCONFIG:
1240
1154
 			return 0;
1241
1155
 
1242
1156
 		case TIOCSERGETLSR: /* Get line status register */
1243
1157
 			return get_lsr_info(info, argp);
1244
-
1245
-		case TIOCSERGSTRUCT:
1246
-			if (copy_to_user(argp,
1247
-					 info, sizeof(struct serial_state)))
1248
-				return -EFAULT;
1249
-			return 0;
1250
1158
 
1251
1159
 		/*
1252
1160
 		 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
..
..
@@ -1287,12 +1195,6 @@
1287
1195
 			}
1288
1196
 			finish_wait(&info->tport.delta_msr_wait, &wait);
1289
1197
 			return ret;
1290
-
1291
-		case TIOCSERGWILD:
1292
-		case TIOCSERSWILD:
1293
-			/* "setserial -W" is called in Debian boot */
1294
-			printk ("TIOCSER?WILD ioctl obsolete, ignored.\n");
1295
-			return 0;
1296
1198
 
1297
1199
 		default:
1298
1200
 			return -ENOIOCTLCMD;
..
..
@@ -1359,9 +1261,6 @@
1359
1261
 	struct serial_state *state = tty->driver_data;
1360
1262
 	struct tty_port *port = &state->tport;
1361
1263
 
1362
-	if (serial_paranoia_check(state, tty->name, "rs_close"))
1363
-		return;
1364
-
1365
1264
 	if (tty_port_close_start(port, tty, filp) == 0)
1366
1265
 		return;
1367
1266
 
..
..
@@ -1404,9 +1303,6 @@
1404
1303
 	struct serial_state *info = tty->driver_data;
1405
1304
 	unsigned long orig_jiffies, char_time;
1406
1305
 	int lsr;
1407
-
1408
-	if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
1409
-		return;
1410
1306
 
1411
1307
 	if (info->xmit_fifo_size == 0)
1412
1308
 		return; /* Just in case.... */
..
..
@@ -1466,9 +1362,6 @@
1466
1362
 {
1467
1363
 	struct serial_state *info = tty->driver_data;
1468
1364
 
1469
-	if (serial_paranoia_check(info, tty->name, "rs_hangup"))
1470
-		return;
1471
-
1472
1365
 	rs_flush_buffer(tty);
1473
1366
 	shutdown(tty, info);
1474
1367
 	info->tport.count = 0;
..
..
@@ -1493,8 +1386,6 @@
1493
1386
 	port->tty = tty;
1494
1387
 	tty->driver_data = info;
1495
1388
 	tty->port = port;
1496
-	if (serial_paranoia_check(info, tty->name, "rs_open"))
1497
-		return -ENODEV;
1498
1389
 
1499
1390
 	port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1500
1391
 
..
..
@@ -1607,6 +1498,8 @@
1607
1498
 	.tiocmget = rs_tiocmget,
1608
1499
 	.tiocmset = rs_tiocmset,
1609
1500
 	.get_icount = rs_get_icount,
1501
+	.set_serial = set_serial_info,
1502
+	.get_serial = get_serial_info,
1610
1503
 	.proc_show = rs_proc_show,
1611
1504
 };
1612
1505