23f684337fdd0f9db16b9a89a8c88a1dd1b6930d
[linux-3.10.git] / drivers / net / wireless / libertas / cmdresp.c
1 /**
2   * This file contains the handling of command
3   * responses as well as events generated by firmware.
4   */
5 #include <linux/delay.h>
6 #include <linux/sched.h>
7 #include <linux/if_arp.h>
8 #include <linux/netdevice.h>
9 #include <asm/unaligned.h>
10 #include <net/iw_handler.h>
11
12 #include "host.h"
13 #include "decl.h"
14 #include "defs.h"
15 #include "dev.h"
16 #include "assoc.h"
17 #include "wext.h"
18
19 /**
20  *  @brief This function handles disconnect event. it
21  *  reports disconnect to upper layer, clean tx/rx packets,
22  *  reset link state etc.
23  *
24  *  @param priv    A pointer to struct lbs_private structure
25  *  @return        n/a
26  */
27 void lbs_mac_event_disconnected(struct lbs_private *priv)
28 {
29         union iwreq_data wrqu;
30
31         if (priv->connect_status != LBS_CONNECTED)
32                 return;
33
34         lbs_deb_enter(LBS_DEB_ASSOC);
35
36         memset(wrqu.ap_addr.sa_data, 0x00, ETH_ALEN);
37         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
38
39         /*
40          * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
41          * It causes problem in the Supplicant
42          */
43
44         msleep_interruptible(1000);
45         wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
46
47         /* report disconnect to upper layer */
48         netif_stop_queue(priv->dev);
49         netif_carrier_off(priv->dev);
50
51         /* Free Tx and Rx packets */
52         kfree_skb(priv->currenttxskb);
53         priv->currenttxskb = NULL;
54         priv->tx_pending_len = 0;
55
56         /* reset SNR/NF/RSSI values */
57         memset(priv->SNR, 0x00, sizeof(priv->SNR));
58         memset(priv->NF, 0x00, sizeof(priv->NF));
59         memset(priv->RSSI, 0x00, sizeof(priv->RSSI));
60         memset(priv->rawSNR, 0x00, sizeof(priv->rawSNR));
61         memset(priv->rawNF, 0x00, sizeof(priv->rawNF));
62         priv->nextSNRNF = 0;
63         priv->numSNRNF = 0;
64         priv->connect_status = LBS_DISCONNECTED;
65
66         /* Clear out associated SSID and BSSID since connection is
67          * no longer valid.
68          */
69         memset(&priv->curbssparams.bssid, 0, ETH_ALEN);
70         memset(&priv->curbssparams.ssid, 0, IW_ESSID_MAX_SIZE);
71         priv->curbssparams.ssid_len = 0;
72
73         if (priv->psstate != PS_STATE_FULL_POWER) {
74                 /* make firmware to exit PS mode */
75                 lbs_deb_cmd("disconnected, so exit PS mode\n");
76                 lbs_ps_wakeup(priv, 0);
77         }
78         lbs_deb_leave(LBS_DEB_ASSOC);
79 }
80
81 /**
82  *  @brief This function handles MIC failure event.
83  *
84  *  @param priv    A pointer to struct lbs_private structure
85  *  @para  event   the event id
86  *  @return        n/a
87  */
88 static void handle_mic_failureevent(struct lbs_private *priv, u32 event)
89 {
90         char buf[50];
91
92         lbs_deb_enter(LBS_DEB_CMD);
93         memset(buf, 0, sizeof(buf));
94
95         sprintf(buf, "%s", "MLME-MICHAELMICFAILURE.indication ");
96
97         if (event == MACREG_INT_CODE_MIC_ERR_UNICAST) {
98                 strcat(buf, "unicast ");
99         } else {
100                 strcat(buf, "multicast ");
101         }
102
103         lbs_send_iwevcustom_event(priv, buf);
104         lbs_deb_leave(LBS_DEB_CMD);
105 }
106
107 static int lbs_ret_reg_access(struct lbs_private *priv,
108                                u16 type, struct cmd_ds_command *resp)
109 {
110         int ret = 0;
111
112         lbs_deb_enter(LBS_DEB_CMD);
113
114         switch (type) {
115         case CMD_RET(CMD_MAC_REG_ACCESS):
116                 {
117                         struct cmd_ds_mac_reg_access *reg = &resp->params.macreg;
118
119                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
120                         priv->offsetvalue.value = le32_to_cpu(reg->value);
121                         break;
122                 }
123
124         case CMD_RET(CMD_BBP_REG_ACCESS):
125                 {
126                         struct cmd_ds_bbp_reg_access *reg = &resp->params.bbpreg;
127
128                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
129                         priv->offsetvalue.value = reg->value;
130                         break;
131                 }
132
133         case CMD_RET(CMD_RF_REG_ACCESS):
134                 {
135                         struct cmd_ds_rf_reg_access *reg = &resp->params.rfreg;
136
137                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
138                         priv->offsetvalue.value = reg->value;
139                         break;
140                 }
141
142         default:
143                 ret = -1;
144         }
145
146         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
147         return ret;
148 }
149
150 static int lbs_ret_802_11_rssi(struct lbs_private *priv,
151                                 struct cmd_ds_command *resp)
152 {
153         struct cmd_ds_802_11_rssi_rsp *rssirsp = &resp->params.rssirsp;
154
155         lbs_deb_enter(LBS_DEB_CMD);
156
157         /* store the non average value */
158         priv->SNR[TYPE_BEACON][TYPE_NOAVG] = get_unaligned_le16(&rssirsp->SNR);
159         priv->NF[TYPE_BEACON][TYPE_NOAVG] = get_unaligned_le16(&rssirsp->noisefloor);
160
161         priv->SNR[TYPE_BEACON][TYPE_AVG] = get_unaligned_le16(&rssirsp->avgSNR);
162         priv->NF[TYPE_BEACON][TYPE_AVG] = get_unaligned_le16(&rssirsp->avgnoisefloor);
163
164         priv->RSSI[TYPE_BEACON][TYPE_NOAVG] =
165             CAL_RSSI(priv->SNR[TYPE_BEACON][TYPE_NOAVG],
166                      priv->NF[TYPE_BEACON][TYPE_NOAVG]);
167
168         priv->RSSI[TYPE_BEACON][TYPE_AVG] =
169             CAL_RSSI(priv->SNR[TYPE_BEACON][TYPE_AVG] / AVG_SCALE,
170                      priv->NF[TYPE_BEACON][TYPE_AVG] / AVG_SCALE);
171
172         lbs_deb_cmd("RSSI: beacon %d, avg %d\n",
173                priv->RSSI[TYPE_BEACON][TYPE_NOAVG],
174                priv->RSSI[TYPE_BEACON][TYPE_AVG]);
175
176         lbs_deb_leave(LBS_DEB_CMD);
177         return 0;
178 }
179
180 static int lbs_ret_802_11_bcn_ctrl(struct lbs_private * priv,
181                                         struct cmd_ds_command *resp)
182 {
183         struct cmd_ds_802_11_beacon_control *bcn_ctrl =
184             &resp->params.bcn_ctrl;
185
186         lbs_deb_enter(LBS_DEB_CMD);
187
188         if (bcn_ctrl->action == CMD_ACT_GET) {
189                 priv->beacon_enable = (u8) le16_to_cpu(bcn_ctrl->beacon_enable);
190                 priv->beacon_period = le16_to_cpu(bcn_ctrl->beacon_period);
191         }
192
193         lbs_deb_enter(LBS_DEB_CMD);
194         return 0;
195 }
196
197 static inline int handle_cmd_response(struct lbs_private *priv,
198                                       struct cmd_header *cmd_response)
199 {
200         struct cmd_ds_command *resp = (struct cmd_ds_command *) cmd_response;
201         int ret = 0;
202         unsigned long flags;
203         uint16_t respcmd = le16_to_cpu(resp->command);
204
205         lbs_deb_enter(LBS_DEB_HOST);
206
207         switch (respcmd) {
208         case CMD_RET(CMD_MAC_REG_ACCESS):
209         case CMD_RET(CMD_BBP_REG_ACCESS):
210         case CMD_RET(CMD_RF_REG_ACCESS):
211                 ret = lbs_ret_reg_access(priv, respcmd, resp);
212                 break;
213
214         case CMD_RET(CMD_802_11_SET_AFC):
215         case CMD_RET(CMD_802_11_GET_AFC):
216                 spin_lock_irqsave(&priv->driver_lock, flags);
217                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.afc,
218                         sizeof(struct cmd_ds_802_11_afc));
219                 spin_unlock_irqrestore(&priv->driver_lock, flags);
220
221                 break;
222
223         case CMD_RET(CMD_802_11_BEACON_STOP):
224                 break;
225
226         case CMD_RET(CMD_802_11_RSSI):
227                 ret = lbs_ret_802_11_rssi(priv, resp);
228                 break;
229
230         case CMD_RET(CMD_802_11D_DOMAIN_INFO):
231                 ret = lbs_ret_802_11d_domain_info(resp);
232                 break;
233
234         case CMD_RET(CMD_802_11_TPC_CFG):
235                 spin_lock_irqsave(&priv->driver_lock, flags);
236                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.tpccfg,
237                         sizeof(struct cmd_ds_802_11_tpc_cfg));
238                 spin_unlock_irqrestore(&priv->driver_lock, flags);
239                 break;
240         case CMD_RET(CMD_802_11_LED_GPIO_CTRL):
241                 spin_lock_irqsave(&priv->driver_lock, flags);
242                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.ledgpio,
243                         sizeof(struct cmd_ds_802_11_led_ctrl));
244                 spin_unlock_irqrestore(&priv->driver_lock, flags);
245                 break;
246
247         case CMD_RET(CMD_GET_TSF):
248                 spin_lock_irqsave(&priv->driver_lock, flags);
249                 memcpy((void *)priv->cur_cmd->callback_arg,
250                        &resp->params.gettsf.tsfvalue, sizeof(u64));
251                 spin_unlock_irqrestore(&priv->driver_lock, flags);
252                 break;
253         case CMD_RET(CMD_BT_ACCESS):
254                 spin_lock_irqsave(&priv->driver_lock, flags);
255                 if (priv->cur_cmd->callback_arg)
256                         memcpy((void *)priv->cur_cmd->callback_arg,
257                                &resp->params.bt.addr1, 2 * ETH_ALEN);
258                 spin_unlock_irqrestore(&priv->driver_lock, flags);
259                 break;
260         case CMD_RET(CMD_FWT_ACCESS):
261                 spin_lock_irqsave(&priv->driver_lock, flags);
262                 if (priv->cur_cmd->callback_arg)
263                         memcpy((void *)priv->cur_cmd->callback_arg, &resp->params.fwt,
264                                sizeof(resp->params.fwt));
265                 spin_unlock_irqrestore(&priv->driver_lock, flags);
266                 break;
267         case CMD_RET(CMD_802_11_BEACON_CTRL):
268                 ret = lbs_ret_802_11_bcn_ctrl(priv, resp);
269                 break;
270
271         default:
272                 lbs_pr_err("CMD_RESP: unknown cmd response 0x%04x\n",
273                            le16_to_cpu(resp->command));
274                 break;
275         }
276         lbs_deb_leave(LBS_DEB_HOST);
277         return ret;
278 }
279
280 int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
281 {
282         uint16_t respcmd, curcmd;
283         struct cmd_header *resp;
284         int ret = 0;
285         unsigned long flags;
286         uint16_t result;
287
288         lbs_deb_enter(LBS_DEB_HOST);
289
290         mutex_lock(&priv->lock);
291         spin_lock_irqsave(&priv->driver_lock, flags);
292
293         if (!priv->cur_cmd) {
294                 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
295                 ret = -1;
296                 spin_unlock_irqrestore(&priv->driver_lock, flags);
297                 goto done;
298         }
299
300         resp = (void *)data;
301         curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
302         respcmd = le16_to_cpu(resp->command);
303         result = le16_to_cpu(resp->result);
304
305         lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
306                      respcmd, le16_to_cpu(resp->seqnum), len);
307         lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
308
309         if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
310                 lbs_pr_info("Received CMD_RESP with invalid sequence %d (expected %d)\n",
311                             le16_to_cpu(resp->seqnum), le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
312                 spin_unlock_irqrestore(&priv->driver_lock, flags);
313                 ret = -1;
314                 goto done;
315         }
316         if (respcmd != CMD_RET(curcmd) &&
317             respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {
318                 lbs_pr_info("Invalid CMD_RESP %x to command %x!\n", respcmd, curcmd);
319                 spin_unlock_irqrestore(&priv->driver_lock, flags);
320                 ret = -1;
321                 goto done;
322         }
323
324         if (resp->result == cpu_to_le16(0x0004)) {
325                 /* 0x0004 means -EAGAIN. Drop the response, let it time out
326                    and be resubmitted */
327                 lbs_pr_info("Firmware returns DEFER to command %x. Will let it time out...\n",
328                             le16_to_cpu(resp->command));
329                 spin_unlock_irqrestore(&priv->driver_lock, flags);
330                 ret = -1;
331                 goto done;
332         }
333
334         /* Now we got response from FW, cancel the command timer */
335         del_timer(&priv->command_timer);
336         priv->cmd_timed_out = 0;
337         if (priv->nr_retries) {
338                 lbs_pr_info("Received result %x to command %x after %d retries\n",
339                             result, curcmd, priv->nr_retries);
340                 priv->nr_retries = 0;
341         }
342
343         /* Store the response code to cur_cmd_retcode. */
344         priv->cur_cmd_retcode = result;
345
346         if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
347                 struct cmd_ds_802_11_ps_mode *psmode = (void *) &resp[1];
348                 u16 action = le16_to_cpu(psmode->action);
349
350                 lbs_deb_host(
351                        "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
352                        result, action);
353
354                 if (result) {
355                         lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
356                                     result);
357                         /*
358                          * We should not re-try enter-ps command in
359                          * ad-hoc mode. It takes place in
360                          * lbs_execute_next_command().
361                          */
362                         if (priv->mode == IW_MODE_ADHOC &&
363                             action == CMD_SUBCMD_ENTER_PS)
364                                 priv->psmode = LBS802_11POWERMODECAM;
365                 } else if (action == CMD_SUBCMD_ENTER_PS) {
366                         priv->needtowakeup = 0;
367                         priv->psstate = PS_STATE_AWAKE;
368
369                         lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
370                         if (priv->connect_status != LBS_CONNECTED) {
371                                 /*
372                                  * When Deauth Event received before Enter_PS command
373                                  * response, We need to wake up the firmware.
374                                  */
375                                 lbs_deb_host(
376                                        "disconnected, invoking lbs_ps_wakeup\n");
377
378                                 spin_unlock_irqrestore(&priv->driver_lock, flags);
379                                 mutex_unlock(&priv->lock);
380                                 lbs_ps_wakeup(priv, 0);
381                                 mutex_lock(&priv->lock);
382                                 spin_lock_irqsave(&priv->driver_lock, flags);
383                         }
384                 } else if (action == CMD_SUBCMD_EXIT_PS) {
385                         priv->needtowakeup = 0;
386                         priv->psstate = PS_STATE_FULL_POWER;
387                         lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
388                 } else {
389                         lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
390                 }
391
392                 lbs_complete_command(priv, priv->cur_cmd, result);
393                 spin_unlock_irqrestore(&priv->driver_lock, flags);
394
395                 ret = 0;
396                 goto done;
397         }
398
399         /* If the command is not successful, cleanup and return failure */
400         if ((result != 0 || !(respcmd & 0x8000))) {
401                 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
402                        result, respcmd);
403                 /*
404                  * Handling errors here
405                  */
406                 switch (respcmd) {
407                 case CMD_RET(CMD_GET_HW_SPEC):
408                 case CMD_RET(CMD_802_11_RESET):
409                         lbs_deb_host("CMD_RESP: reset failed\n");
410                         break;
411
412                 }
413                 lbs_complete_command(priv, priv->cur_cmd, result);
414                 spin_unlock_irqrestore(&priv->driver_lock, flags);
415
416                 ret = -1;
417                 goto done;
418         }
419
420         spin_unlock_irqrestore(&priv->driver_lock, flags);
421
422         if (priv->cur_cmd && priv->cur_cmd->callback) {
423                 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
424                                 resp);
425         } else
426                 ret = handle_cmd_response(priv, resp);
427
428         spin_lock_irqsave(&priv->driver_lock, flags);
429
430         if (priv->cur_cmd) {
431                 /* Clean up and Put current command back to cmdfreeq */
432                 lbs_complete_command(priv, priv->cur_cmd, result);
433         }
434         spin_unlock_irqrestore(&priv->driver_lock, flags);
435
436 done:
437         mutex_unlock(&priv->lock);
438         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
439         return ret;
440 }
441
442 static int lbs_send_confirmwake(struct lbs_private *priv)
443 {
444         struct cmd_header cmd;
445         int ret = 0;
446
447         lbs_deb_enter(LBS_DEB_HOST);
448
449         cmd.command = cpu_to_le16(CMD_802_11_WAKEUP_CONFIRM);
450         cmd.size = cpu_to_le16(sizeof(cmd));
451         cmd.seqnum = cpu_to_le16(++priv->seqnum);
452         cmd.result = 0;
453
454         lbs_deb_hex(LBS_DEB_HOST, "wake confirm", (u8 *) &cmd,
455                 sizeof(cmd));
456
457         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &cmd, sizeof(cmd));
458         if (ret)
459                 lbs_pr_alert("SEND_WAKEC_CMD: Host to Card failed for Confirm Wake\n");
460
461         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
462         return ret;
463 }
464
465 int lbs_process_event(struct lbs_private *priv, u32 event)
466 {
467         int ret = 0;
468
469         lbs_deb_enter(LBS_DEB_CMD);
470
471         switch (event) {
472         case MACREG_INT_CODE_LINK_SENSED:
473                 lbs_deb_cmd("EVENT: link sensed\n");
474                 break;
475
476         case MACREG_INT_CODE_DEAUTHENTICATED:
477                 lbs_deb_cmd("EVENT: deauthenticated\n");
478                 lbs_mac_event_disconnected(priv);
479                 break;
480
481         case MACREG_INT_CODE_DISASSOCIATED:
482                 lbs_deb_cmd("EVENT: disassociated\n");
483                 lbs_mac_event_disconnected(priv);
484                 break;
485
486         case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
487                 lbs_deb_cmd("EVENT: link lost\n");
488                 lbs_mac_event_disconnected(priv);
489                 break;
490
491         case MACREG_INT_CODE_PS_SLEEP:
492                 lbs_deb_cmd("EVENT: ps sleep\n");
493
494                 /* handle unexpected PS SLEEP event */
495                 if (priv->psstate == PS_STATE_FULL_POWER) {
496                         lbs_deb_cmd(
497                                "EVENT: in FULL POWER mode, ignoreing PS_SLEEP\n");
498                         break;
499                 }
500                 priv->psstate = PS_STATE_PRE_SLEEP;
501
502                 lbs_ps_confirm_sleep(priv);
503
504                 break;
505
506         case MACREG_INT_CODE_HOST_AWAKE:
507                 lbs_deb_cmd("EVENT: host awake\n");
508                 lbs_send_confirmwake(priv);
509                 break;
510
511         case MACREG_INT_CODE_PS_AWAKE:
512                 lbs_deb_cmd("EVENT: ps awake\n");
513                 /* handle unexpected PS AWAKE event */
514                 if (priv->psstate == PS_STATE_FULL_POWER) {
515                         lbs_deb_cmd(
516                                "EVENT: In FULL POWER mode - ignore PS AWAKE\n");
517                         break;
518                 }
519
520                 priv->psstate = PS_STATE_AWAKE;
521
522                 if (priv->needtowakeup) {
523                         /*
524                          * wait for the command processing to finish
525                          * before resuming sending
526                          * priv->needtowakeup will be set to FALSE
527                          * in lbs_ps_wakeup()
528                          */
529                         lbs_deb_cmd("waking up ...\n");
530                         lbs_ps_wakeup(priv, 0);
531                 }
532                 break;
533
534         case MACREG_INT_CODE_MIC_ERR_UNICAST:
535                 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
536                 handle_mic_failureevent(priv, MACREG_INT_CODE_MIC_ERR_UNICAST);
537                 break;
538
539         case MACREG_INT_CODE_MIC_ERR_MULTICAST:
540                 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
541                 handle_mic_failureevent(priv, MACREG_INT_CODE_MIC_ERR_MULTICAST);
542                 break;
543
544         case MACREG_INT_CODE_MIB_CHANGED:
545                 lbs_deb_cmd("EVENT: MIB CHANGED\n");
546                 break;
547         case MACREG_INT_CODE_INIT_DONE:
548                 lbs_deb_cmd("EVENT: INIT DONE\n");
549                 break;
550         case MACREG_INT_CODE_ADHOC_BCN_LOST:
551                 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
552                 break;
553         case MACREG_INT_CODE_RSSI_LOW:
554                 lbs_pr_alert("EVENT: rssi low\n");
555                 break;
556         case MACREG_INT_CODE_SNR_LOW:
557                 lbs_pr_alert("EVENT: snr low\n");
558                 break;
559         case MACREG_INT_CODE_MAX_FAIL:
560                 lbs_pr_alert("EVENT: max fail\n");
561                 break;
562         case MACREG_INT_CODE_RSSI_HIGH:
563                 lbs_pr_alert("EVENT: rssi high\n");
564                 break;
565         case MACREG_INT_CODE_SNR_HIGH:
566                 lbs_pr_alert("EVENT: snr high\n");
567                 break;
568
569         case MACREG_INT_CODE_MESH_AUTO_STARTED:
570                 /* Ignore spurious autostart events if autostart is disabled */
571                 if (!priv->mesh_autostart_enabled) {
572                         lbs_pr_info("EVENT: MESH_AUTO_STARTED (ignoring)\n");
573                         break;
574                 }
575                 lbs_pr_info("EVENT: MESH_AUTO_STARTED\n");
576                 priv->mesh_connect_status = LBS_CONNECTED;
577                 if (priv->mesh_open) {
578                         netif_carrier_on(priv->mesh_dev);
579                         if (!priv->tx_pending_len)
580                                 netif_wake_queue(priv->mesh_dev);
581                 }
582                 priv->mode = IW_MODE_ADHOC;
583                 schedule_work(&priv->sync_channel);
584                 break;
585
586         default:
587                 lbs_pr_alert("EVENT: unknown event id %d\n", event);
588                 break;
589         }
590
591         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
592         return ret;
593 }