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/drivers/scsi/gdth_proc.c

http://github.com/mirrors/linux
C | 586 lines | 496 code | 63 blank | 27 comment | 160 complexity | 811e99be739e60967f5ffacee0cb24ae MD5 | raw file
  1// SPDX-License-Identifier: GPL-2.0
  2/* gdth_proc.c 
  3 * $Id: gdth_proc.c,v 1.43 2006/01/11 16:15:00 achim Exp $
  4 */
  5
  6#include <linux/completion.h>
  7#include <linux/slab.h>
  8
  9int gdth_set_info(struct Scsi_Host *host, char *buffer, int length)
 10{
 11    gdth_ha_str *ha = shost_priv(host);
 12    int ret_val = -EINVAL;
 13
 14    TRACE2(("gdth_set_info() ha %d\n",ha->hanum,));
 15
 16    if (length >= 4) {
 17        if (strncmp(buffer,"gdth",4) == 0) {
 18            buffer += 5;
 19            length -= 5;
 20            ret_val = gdth_set_asc_info(host, buffer, length, ha);
 21        }
 22    }
 23
 24    return ret_val;
 25}
 26         
 27static int gdth_set_asc_info(struct Scsi_Host *host, char *buffer,
 28                        int length, gdth_ha_str *ha)
 29{
 30    int orig_length, drive, wb_mode;
 31    int i, found;
 32    gdth_cmd_str    gdtcmd;
 33    gdth_cpar_str   *pcpar;
 34
 35    char            cmnd[MAX_COMMAND_SIZE];
 36    memset(cmnd, 0xff, 12);
 37    memset(&gdtcmd, 0, sizeof(gdth_cmd_str));
 38
 39    TRACE2(("gdth_set_asc_info() ha %d\n",ha->hanum));
 40    orig_length = length + 5;
 41    drive = -1;
 42    wb_mode = 0;
 43    found = FALSE;
 44
 45    if (length >= 5 && strncmp(buffer,"flush",5)==0) {
 46        buffer += 6;
 47        length -= 6;
 48        if (length && *buffer>='0' && *buffer<='9') {
 49            drive = (int)(*buffer-'0');
 50            ++buffer; --length;
 51            if (length && *buffer>='0' && *buffer<='9') {
 52                drive = drive*10 + (int)(*buffer-'0');
 53                ++buffer; --length;
 54            }
 55            printk("GDT: Flushing host drive %d .. ",drive);
 56        } else {
 57            printk("GDT: Flushing all host drives .. ");
 58        }
 59        for (i = 0; i < MAX_HDRIVES; ++i) {
 60            if (ha->hdr[i].present) {
 61                if (drive != -1 && i != drive)
 62                    continue;
 63                found = TRUE;
 64                gdtcmd.Service = CACHESERVICE;
 65                gdtcmd.OpCode = GDT_FLUSH;
 66                if (ha->cache_feat & GDT_64BIT) {
 67                    gdtcmd.u.cache64.DeviceNo = i;
 68                    gdtcmd.u.cache64.BlockNo = 1;
 69                } else {
 70                    gdtcmd.u.cache.DeviceNo = i;
 71                    gdtcmd.u.cache.BlockNo = 1;
 72                }
 73
 74                gdth_execute(host, &gdtcmd, cmnd, 30, NULL);
 75            }
 76        }
 77        if (!found)
 78            printk("\nNo host drive found !\n");
 79        else
 80            printk("Done.\n");
 81        return(orig_length);
 82    }
 83
 84    if (length >= 7 && strncmp(buffer,"wbp_off",7)==0) {
 85        buffer += 8;
 86        length -= 8;
 87        printk("GDT: Disabling write back permanently .. ");
 88        wb_mode = 1;
 89    } else if (length >= 6 && strncmp(buffer,"wbp_on",6)==0) {
 90        buffer += 7;
 91        length -= 7;
 92        printk("GDT: Enabling write back permanently .. ");
 93        wb_mode = 2;
 94    } else if (length >= 6 && strncmp(buffer,"wb_off",6)==0) {
 95        buffer += 7;
 96        length -= 7;
 97        printk("GDT: Disabling write back commands .. ");
 98        if (ha->cache_feat & GDT_WR_THROUGH) {
 99            gdth_write_through = TRUE;
100            printk("Done.\n");
101        } else {
102            printk("Not supported !\n");
103        }
104        return(orig_length);
105    } else if (length >= 5 && strncmp(buffer,"wb_on",5)==0) {
106        buffer += 6;
107        length -= 6;
108        printk("GDT: Enabling write back commands .. ");
109        gdth_write_through = FALSE;
110        printk("Done.\n");
111        return(orig_length);
112    }
113
114    if (wb_mode) {
115	unsigned long flags;
116
117	BUILD_BUG_ON(sizeof(gdth_cpar_str) > GDTH_SCRATCH);
118
119	spin_lock_irqsave(&ha->smp_lock, flags);
120	if (ha->scratch_busy) {
121	    spin_unlock_irqrestore(&ha->smp_lock, flags);
122            return -EBUSY;
123	}
124	ha->scratch_busy = TRUE;
125	spin_unlock_irqrestore(&ha->smp_lock, flags);
126
127        pcpar = (gdth_cpar_str *)ha->pscratch;
128        memcpy( pcpar, &ha->cpar, sizeof(gdth_cpar_str) );
129        gdtcmd.Service = CACHESERVICE;
130        gdtcmd.OpCode = GDT_IOCTL;
131        gdtcmd.u.ioctl.p_param = ha->scratch_phys;
132        gdtcmd.u.ioctl.param_size = sizeof(gdth_cpar_str);
133        gdtcmd.u.ioctl.subfunc = CACHE_CONFIG;
134        gdtcmd.u.ioctl.channel = INVALID_CHANNEL;
135        pcpar->write_back = wb_mode==1 ? 0:1;
136
137        gdth_execute(host, &gdtcmd, cmnd, 30, NULL);
138
139	spin_lock_irqsave(&ha->smp_lock, flags);
140	ha->scratch_busy = FALSE;
141	spin_unlock_irqrestore(&ha->smp_lock, flags);
142
143        printk("Done.\n");
144        return(orig_length);
145    }
146
147    printk("GDT: Unknown command: %s  Length: %d\n",buffer,length);
148    return(-EINVAL);
149}
150
151int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
152{
153    gdth_ha_str *ha = shost_priv(host);
154    int hlen;
155    int id, i, j, k, sec, flag;
156    int no_mdrv = 0, drv_no, is_mirr;
157    u32 cnt;
158    dma_addr_t paddr;
159    int rc = -ENOMEM;
160
161    gdth_cmd_str *gdtcmd;
162    gdth_evt_str *estr;
163    char hrec[277];
164
165    char *buf;
166    gdth_dskstat_str *pds;
167    gdth_diskinfo_str *pdi;
168    gdth_arrayinf_str *pai;
169    gdth_defcnt_str *pdef;
170    gdth_cdrinfo_str *pcdi;
171    gdth_hget_str *phg;
172    char cmnd[MAX_COMMAND_SIZE];
173
174    gdtcmd = kmalloc(sizeof(*gdtcmd), GFP_KERNEL);
175    estr = kmalloc(sizeof(*estr), GFP_KERNEL);
176    if (!gdtcmd || !estr)
177        goto free_fail;
178
179    memset(cmnd, 0xff, 12);
180    memset(gdtcmd, 0, sizeof(gdth_cmd_str));
181
182    TRACE2(("gdth_get_info() ha %d\n",ha->hanum));
183
184    
185    /* request is i.e. "cat /proc/scsi/gdth/0" */ 
186    /* format: %-15s\t%-10s\t%-15s\t%s */
187    /* driver parameters */
188    seq_puts(m, "Driver Parameters:\n");
189    if (reserve_list[0] == 0xff)
190        strcpy(hrec, "--");
191    else {
192        hlen = sprintf(hrec, "%d", reserve_list[0]);
193        for (i = 1;  i < MAX_RES_ARGS; i++) {
194            if (reserve_list[i] == 0xff) 
195                break;
196	    hlen += scnprintf(hrec + hlen, 161 - hlen, ",%d", reserve_list[i]);
197        }
198    }
199    seq_printf(m,
200                   " reserve_mode: \t%d         \treserve_list:  \t%s\n",
201                   reserve_mode, hrec);
202    seq_printf(m,
203                   " max_ids:      \t%-3d       \thdr_channel:   \t%d\n",
204                   max_ids, hdr_channel);
205
206    /* controller information */
207    seq_puts(m, "\nDisk Array Controller Information:\n");
208    seq_printf(m,
209                   " Number:       \t%d         \tName:          \t%s\n",
210                   ha->hanum, ha->binfo.type_string);
211
212    seq_printf(m,
213                   " Driver Ver.:  \t%-10s\tFirmware Ver.: \t",
214                   GDTH_VERSION_STR);
215    if (ha->more_proc)
216        seq_printf(m, "%d.%02d.%02d-%c%03X\n", 
217                (u8)(ha->binfo.upd_fw_ver>>24),
218                (u8)(ha->binfo.upd_fw_ver>>16),
219                (u8)(ha->binfo.upd_fw_ver),
220                ha->bfeat.raid ? 'R':'N',
221                ha->binfo.upd_revision);
222    else
223        seq_printf(m, "%d.%02d\n", (u8)(ha->cpar.version>>8),
224                (u8)(ha->cpar.version));
225 
226    if (ha->more_proc)
227        /* more information: 1. about controller */
228        seq_printf(m,
229                       " Serial No.:   \t0x%8X\tCache RAM size:\t%d KB\n",
230                       ha->binfo.ser_no, ha->binfo.memsize / 1024);
231
232    if (ha->more_proc) {
233        size_t size = max_t(size_t, GDTH_SCRATCH, sizeof(gdth_hget_str));
234
235        /* more information: 2. about physical devices */
236        seq_puts(m, "\nPhysical Devices:");
237        flag = FALSE;
238            
239        buf = dma_alloc_coherent(&ha->pdev->dev, size, &paddr, GFP_KERNEL);
240        if (!buf) 
241            goto stop_output;
242        for (i = 0; i < ha->bus_cnt; ++i) {
243            /* 2.a statistics (and retries/reassigns) */
244            TRACE2(("pdr_statistics() chn %d\n",i));                
245            pds = (gdth_dskstat_str *)(buf + GDTH_SCRATCH/4);
246            gdtcmd->Service = CACHESERVICE;
247            gdtcmd->OpCode = GDT_IOCTL;
248            gdtcmd->u.ioctl.p_param = paddr + GDTH_SCRATCH/4;
249            gdtcmd->u.ioctl.param_size = 3*GDTH_SCRATCH/4;
250            gdtcmd->u.ioctl.subfunc = DSK_STATISTICS | L_CTRL_PATTERN;
251            gdtcmd->u.ioctl.channel = ha->raw[i].address | INVALID_CHANNEL;
252            pds->bid = ha->raw[i].local_no;
253            pds->first = 0;
254            pds->entries = ha->raw[i].pdev_cnt;
255            cnt = (3*GDTH_SCRATCH/4 - 5 * sizeof(u32)) /
256                sizeof(pds->list[0]);
257            if (pds->entries > cnt)
258                pds->entries = cnt;
259
260            if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) != S_OK)
261                pds->count = 0;
262
263            /* other IOCTLs must fit into area GDTH_SCRATCH/4 */
264            for (j = 0; j < ha->raw[i].pdev_cnt; ++j) {
265                /* 2.b drive info */
266                TRACE2(("scsi_drv_info() chn %d dev %d\n",
267                    i, ha->raw[i].id_list[j]));             
268                pdi = (gdth_diskinfo_str *)buf;
269                gdtcmd->Service = CACHESERVICE;
270                gdtcmd->OpCode = GDT_IOCTL;
271                gdtcmd->u.ioctl.p_param = paddr;
272                gdtcmd->u.ioctl.param_size = sizeof(gdth_diskinfo_str);
273                gdtcmd->u.ioctl.subfunc = SCSI_DR_INFO | L_CTRL_PATTERN;
274                gdtcmd->u.ioctl.channel = 
275                    ha->raw[i].address | ha->raw[i].id_list[j];
276
277                if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
278                    strncpy(hrec,pdi->vendor,8);
279                    strncpy(hrec+8,pdi->product,16);
280                    strncpy(hrec+24,pdi->revision,4);
281                    hrec[28] = 0;
282                    seq_printf(m,
283                                   "\n Chn/ID/LUN:   \t%c/%02d/%d    \tName:          \t%s\n",
284                                   'A'+i,pdi->target_id,pdi->lun,hrec);
285                    flag = TRUE;
286                    pdi->no_ldrive &= 0xffff;
287                    if (pdi->no_ldrive == 0xffff)
288                        strcpy(hrec,"--");
289                    else
290                        sprintf(hrec,"%d",pdi->no_ldrive);
291                    seq_printf(m,
292                                   " Capacity [MB]:\t%-6d    \tTo Log. Drive: \t%s\n",
293                                   pdi->blkcnt/(1024*1024/pdi->blksize),
294                                   hrec);
295                } else {
296                    pdi->devtype = 0xff;
297                }
298                    
299                if (pdi->devtype == 0) {
300                    /* search retries/reassigns */
301                    for (k = 0; k < pds->count; ++k) {
302                        if (pds->list[k].tid == pdi->target_id &&
303                            pds->list[k].lun == pdi->lun) {
304                            seq_printf(m,
305                                           " Retries:      \t%-6d    \tReassigns:     \t%d\n",
306                                           pds->list[k].retries,
307                                           pds->list[k].reassigns);
308                            break;
309                        }
310                    }
311                    /* 2.c grown defects */
312                    TRACE2(("scsi_drv_defcnt() chn %d dev %d\n",
313                            i, ha->raw[i].id_list[j]));             
314                    pdef = (gdth_defcnt_str *)buf;
315                    gdtcmd->Service = CACHESERVICE;
316                    gdtcmd->OpCode = GDT_IOCTL;
317                    gdtcmd->u.ioctl.p_param = paddr;
318                    gdtcmd->u.ioctl.param_size = sizeof(gdth_defcnt_str);
319                    gdtcmd->u.ioctl.subfunc = SCSI_DEF_CNT | L_CTRL_PATTERN;
320                    gdtcmd->u.ioctl.channel = 
321                        ha->raw[i].address | ha->raw[i].id_list[j];
322                    pdef->sddc_type = 0x08;
323
324                    if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
325                        seq_printf(m,
326                                       " Grown Defects:\t%d\n",
327                                       pdef->sddc_cnt);
328                    }
329                }
330            }
331        }
332
333        if (!flag)
334            seq_puts(m, "\n --\n");
335
336        /* 3. about logical drives */
337        seq_puts(m, "\nLogical Drives:");
338        flag = FALSE;
339
340        for (i = 0; i < MAX_LDRIVES; ++i) {
341            if (!ha->hdr[i].is_logdrv)
342                continue;
343            drv_no = i;
344            j = k = 0;
345            is_mirr = FALSE;
346            do {
347                /* 3.a log. drive info */
348                TRACE2(("cache_drv_info() drive no %d\n",drv_no));
349                pcdi = (gdth_cdrinfo_str *)buf;
350                gdtcmd->Service = CACHESERVICE;
351                gdtcmd->OpCode = GDT_IOCTL;
352                gdtcmd->u.ioctl.p_param = paddr;
353                gdtcmd->u.ioctl.param_size = sizeof(gdth_cdrinfo_str);
354                gdtcmd->u.ioctl.subfunc = CACHE_DRV_INFO;
355                gdtcmd->u.ioctl.channel = drv_no;
356                if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) != S_OK)
357                    break;
358                pcdi->ld_dtype >>= 16;
359                j++;
360                if (pcdi->ld_dtype > 2) {
361                    strcpy(hrec, "missing");
362                } else if (pcdi->ld_error & 1) {
363                    strcpy(hrec, "fault");
364                } else if (pcdi->ld_error & 2) {
365                    strcpy(hrec, "invalid");
366                    k++; j--;
367                } else {
368                    strcpy(hrec, "ok");
369                }
370                    
371                if (drv_no == i) {
372                    seq_printf(m,
373                                   "\n Number:       \t%-2d        \tStatus:        \t%s\n",
374                                   drv_no, hrec);
375                    flag = TRUE;
376                    no_mdrv = pcdi->cd_ldcnt;
377                    if (no_mdrv > 1 || pcdi->ld_slave != -1) {
378                        is_mirr = TRUE;
379                        strcpy(hrec, "RAID-1");
380                    } else if (pcdi->ld_dtype == 0) {
381                        strcpy(hrec, "Disk");
382                    } else if (pcdi->ld_dtype == 1) {
383                        strcpy(hrec, "RAID-0");
384                    } else if (pcdi->ld_dtype == 2) {
385                        strcpy(hrec, "Chain");
386                    } else {
387                        strcpy(hrec, "???");
388                    }
389                    seq_printf(m,
390                                   " Capacity [MB]:\t%-6d    \tType:          \t%s\n",
391                                   pcdi->ld_blkcnt/(1024*1024/pcdi->ld_blksize),
392                                   hrec);
393                } else {
394                    seq_printf(m,
395                                   " Slave Number: \t%-2d        \tStatus:        \t%s\n",
396                                   drv_no & 0x7fff, hrec);
397                }
398                drv_no = pcdi->ld_slave;
399            } while (drv_no != -1);
400             
401            if (is_mirr)
402                seq_printf(m,
403                               " Missing Drv.: \t%-2d        \tInvalid Drv.:  \t%d\n",
404                               no_mdrv - j - k, k);
405
406            if (!ha->hdr[i].is_arraydrv)
407                strcpy(hrec, "--");
408            else
409                sprintf(hrec, "%d", ha->hdr[i].master_no);
410            seq_printf(m,
411                           " To Array Drv.:\t%s\n", hrec);
412        }       
413
414        if (!flag)
415            seq_puts(m, "\n --\n");
416
417        /* 4. about array drives */
418        seq_puts(m, "\nArray Drives:");
419        flag = FALSE;
420
421        for (i = 0; i < MAX_LDRIVES; ++i) {
422            if (!(ha->hdr[i].is_arraydrv && ha->hdr[i].is_master))
423                continue;
424            /* 4.a array drive info */
425            TRACE2(("array_info() drive no %d\n",i));
426            pai = (gdth_arrayinf_str *)buf;
427            gdtcmd->Service = CACHESERVICE;
428            gdtcmd->OpCode = GDT_IOCTL;
429            gdtcmd->u.ioctl.p_param = paddr;
430            gdtcmd->u.ioctl.param_size = sizeof(gdth_arrayinf_str);
431            gdtcmd->u.ioctl.subfunc = ARRAY_INFO | LA_CTRL_PATTERN;
432            gdtcmd->u.ioctl.channel = i;
433            if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
434                if (pai->ai_state == 0)
435                    strcpy(hrec, "idle");
436                else if (pai->ai_state == 2)
437                    strcpy(hrec, "build");
438                else if (pai->ai_state == 4)
439                    strcpy(hrec, "ready");
440                else if (pai->ai_state == 6)
441                    strcpy(hrec, "fail");
442                else if (pai->ai_state == 8 || pai->ai_state == 10)
443                    strcpy(hrec, "rebuild");
444                else
445                    strcpy(hrec, "error");
446                if (pai->ai_ext_state & 0x10)
447                    strcat(hrec, "/expand");
448                else if (pai->ai_ext_state & 0x1)
449                    strcat(hrec, "/patch");
450                seq_printf(m,
451                               "\n Number:       \t%-2d        \tStatus:        \t%s\n",
452                               i,hrec);
453                flag = TRUE;
454
455                if (pai->ai_type == 0)
456                    strcpy(hrec, "RAID-0");
457                else if (pai->ai_type == 4)
458                    strcpy(hrec, "RAID-4");
459                else if (pai->ai_type == 5)
460                    strcpy(hrec, "RAID-5");
461                else 
462                    strcpy(hrec, "RAID-10");
463                seq_printf(m,
464                               " Capacity [MB]:\t%-6d    \tType:          \t%s\n",
465                               pai->ai_size/(1024*1024/pai->ai_secsize),
466                               hrec);
467            }
468        }
469
470        if (!flag)
471            seq_puts(m, "\n --\n");
472
473        /* 5. about host drives */
474        seq_puts(m, "\nHost Drives:");
475        flag = FALSE;
476
477        for (i = 0; i < MAX_LDRIVES; ++i) {
478            if (!ha->hdr[i].is_logdrv || 
479                (ha->hdr[i].is_arraydrv && !ha->hdr[i].is_master))
480                continue;
481            /* 5.a get host drive list */
482            TRACE2(("host_get() drv_no %d\n",i));           
483            phg = (gdth_hget_str *)buf;
484            gdtcmd->Service = CACHESERVICE;
485            gdtcmd->OpCode = GDT_IOCTL;
486            gdtcmd->u.ioctl.p_param = paddr;
487            gdtcmd->u.ioctl.param_size = sizeof(gdth_hget_str);
488            gdtcmd->u.ioctl.subfunc = HOST_GET | LA_CTRL_PATTERN;
489            gdtcmd->u.ioctl.channel = i;
490            phg->entries = MAX_HDRIVES;
491            phg->offset = GDTOFFSOF(gdth_hget_str, entry[0]); 
492            if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
493                ha->hdr[i].ldr_no = i;
494                ha->hdr[i].rw_attribs = 0;
495                ha->hdr[i].start_sec = 0;
496            } else {
497                for (j = 0; j < phg->entries; ++j) {
498                    k = phg->entry[j].host_drive;
499                    if (k >= MAX_LDRIVES)
500                        continue;
501                    ha->hdr[k].ldr_no = phg->entry[j].log_drive;
502                    ha->hdr[k].rw_attribs = phg->entry[j].rw_attribs;
503                    ha->hdr[k].start_sec = phg->entry[j].start_sec;
504                }
505            }
506        }
507	dma_free_coherent(&ha->pdev->dev, size, buf, paddr);
508
509        for (i = 0; i < MAX_HDRIVES; ++i) {
510            if (!(ha->hdr[i].present))
511                continue;
512              
513            seq_printf(m,
514                           "\n Number:       \t%-2d        \tArr/Log. Drive:\t%d\n",
515                           i, ha->hdr[i].ldr_no);
516            flag = TRUE;
517
518            seq_printf(m,
519                           " Capacity [MB]:\t%-6d    \tStart Sector:  \t%d\n",
520                           (u32)(ha->hdr[i].size/2048), ha->hdr[i].start_sec);
521        }
522        
523        if (!flag)
524            seq_puts(m, "\n --\n");
525    }
526
527    /* controller events */
528    seq_puts(m, "\nController Events:\n");
529
530    for (id = -1;;) {
531        id = gdth_read_event(ha, id, estr);
532        if (estr->event_source == 0)
533            break;
534        if (estr->event_data.eu.driver.ionode == ha->hanum &&
535            estr->event_source == ES_ASYNC) { 
536            gdth_log_event(&estr->event_data, hrec);
537
538	    /*
539	     * Elapsed seconds subtraction with unsigned operands is
540	     * safe from wrap around in year 2106.  Executes as:
541	     * operand a + (2's complement operand b) + 1
542	     */
543
544	    sec = (int)((u32)ktime_get_real_seconds() - estr->first_stamp);
545            if (sec < 0) sec = 0;
546            seq_printf(m," date- %02d:%02d:%02d\t%s\n",
547                           sec/3600, sec%3600/60, sec%60, hrec);
548        }
549        if (id == -1)
550            break;
551    }
552stop_output:
553    rc = 0;
554free_fail:
555    kfree(gdtcmd);
556    kfree(estr);
557    return rc;
558}
559
560static void gdth_wait_completion(gdth_ha_str *ha, int busnum, int id)
561{
562    unsigned long flags;
563    int i;
564    struct scsi_cmnd *scp;
565    struct gdth_cmndinfo *cmndinfo;
566    u8 b, t;
567
568    spin_lock_irqsave(&ha->smp_lock, flags);
569
570    for (i = 0; i < GDTH_MAXCMDS; ++i) {
571        scp = ha->cmd_tab[i].cmnd;
572        cmndinfo = gdth_cmnd_priv(scp);
573
574        b = scp->device->channel;
575        t = scp->device->id;
576        if (!SPECIAL_SCP(scp) && t == (u8)id && 
577            b == (u8)busnum) {
578            cmndinfo->wait_for_completion = 0;
579            spin_unlock_irqrestore(&ha->smp_lock, flags);
580            while (!cmndinfo->wait_for_completion)
581                barrier();
582            spin_lock_irqsave(&ha->smp_lock, flags);
583        }
584    }
585    spin_unlock_irqrestore(&ha->smp_lock, flags);
586}