root/drivers/edac/edac_device.c

DEFINITIONS

1. edac_device_dump_device
2. edac_device_alloc_ctl_info
3. edac_device_free_ctl_info
4. find_edac_device_by_dev
5. add_edac_dev_to_global_list
6. del_edac_device_from_global_list
7. edac_device_workq_function
8. edac_device_workq_setup
9. edac_device_workq_teardown
10. edac_device_reset_delay_period
11. edac_device_alloc_index
12. edac_device_add_device
13. edac_device_del_device
14. edac_device_get_log_ce
15. edac_device_get_log_ue
16. edac_device_get_panic_on_ue
17. edac_device_handle_ce
18. edac_device_handle_ue

   1 
   2 /*
   3  * edac_device.c
   4  * (C) 2007 www.douglaskthompson.com
   5  *
   6  * This file may be distributed under the terms of the
   7  * GNU General Public License.
   8  *
   9  * Written by Doug Thompson <norsk5@xmission.com>
  10  *
  11  * edac_device API implementation
  12  * 19 Jan 2007
  13  */
  14 
  15 #include <asm/page.h>
  16 #include <linux/uaccess.h>
  17 #include <linux/ctype.h>
  18 #include <linux/highmem.h>
  19 #include <linux/init.h>
  20 #include <linux/jiffies.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23 #include <linux/smp.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/sysctl.h>
  26 #include <linux/timer.h>
  27 
  28 #include "edac_device.h"
  29 #include "edac_module.h"
  30 
  31 /* lock for the list: 'edac_device_list', manipulation of this list
  32  * is protected by the 'device_ctls_mutex' lock
  33  */
  34 static DEFINE_MUTEX(device_ctls_mutex);
  35 static LIST_HEAD(edac_device_list);
  36 
  37 #ifdef CONFIG_EDAC_DEBUG
  38 static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev)
  39 {
  40         edac_dbg(3, "\tedac_dev = %p dev_idx=%d\n",
  41                  edac_dev, edac_dev->dev_idx);
  42         edac_dbg(4, "\tedac_dev->edac_check = %p\n", edac_dev->edac_check);
  43         edac_dbg(3, "\tdev = %p\n", edac_dev->dev);
  44         edac_dbg(3, "\tmod_name:ctl_name = %s:%s\n",
  45                  edac_dev->mod_name, edac_dev->ctl_name);
  46         edac_dbg(3, "\tpvt_info = %p\n\n", edac_dev->pvt_info);
  47 }
  48 #endif                          /* CONFIG_EDAC_DEBUG */
  49 
  50 struct edac_device_ctl_info *edac_device_alloc_ctl_info(
  51         unsigned sz_private,
  52         char *edac_device_name, unsigned nr_instances,
  53         char *edac_block_name, unsigned nr_blocks,
  54         unsigned offset_value,          /* zero, 1, or other based offset */
  55         struct edac_dev_sysfs_block_attribute *attrib_spec, unsigned nr_attrib,
  56         int device_index)
  57 {
  58         struct edac_device_ctl_info *dev_ctl;
  59         struct edac_device_instance *dev_inst, *inst;
  60         struct edac_device_block *dev_blk, *blk_p, *blk;
  61         struct edac_dev_sysfs_block_attribute *dev_attrib, *attrib_p, *attrib;
  62         unsigned total_size;
  63         unsigned count;
  64         unsigned instance, block, attr;
  65         void *pvt, *p;
  66         int err;
  67 
  68         edac_dbg(4, "instances=%d blocks=%d\n", nr_instances, nr_blocks);
  69 
  70         /* Calculate the size of memory we need to allocate AND
  71          * determine the offsets of the various item arrays
  72          * (instance,block,attrib) from the start of an  allocated structure.
  73          * We want the alignment of each item  (instance,block,attrib)
  74          * to be at least as stringent as what the compiler would
  75          * provide if we could simply hardcode everything into a single struct.
  76          */
  77         p = NULL;
  78         dev_ctl = edac_align_ptr(&p, sizeof(*dev_ctl), 1);
  79 
  80         /* Calc the 'end' offset past end of ONE ctl_info structure
  81          * which will become the start of the 'instance' array
  82          */
  83         dev_inst = edac_align_ptr(&p, sizeof(*dev_inst), nr_instances);
  84 
  85         /* Calc the 'end' offset past the instance array within the ctl_info
  86          * which will become the start of the block array
  87          */
  88         count = nr_instances * nr_blocks;
  89         dev_blk = edac_align_ptr(&p, sizeof(*dev_blk), count);
  90 
  91         /* Calc the 'end' offset past the dev_blk array
  92          * which will become the start of the attrib array, if any.
  93          */
  94         /* calc how many nr_attrib we need */
  95         if (nr_attrib > 0)
  96                 count *= nr_attrib;
  97         dev_attrib = edac_align_ptr(&p, sizeof(*dev_attrib), count);
  98 
  99         /* Calc the 'end' offset past the attributes array */
 100         pvt = edac_align_ptr(&p, sz_private, 1);
 101 
 102         /* 'pvt' now points to where the private data area is.
 103          * At this point 'pvt' (like dev_inst,dev_blk and dev_attrib)
 104          * is baselined at ZERO
 105          */
 106         total_size = ((unsigned long)pvt) + sz_private;
 107 
 108         /* Allocate the amount of memory for the set of control structures */
 109         dev_ctl = kzalloc(total_size, GFP_KERNEL);
 110         if (dev_ctl == NULL)
 111                 return NULL;
 112 
 113         /* Adjust pointers so they point within the actual memory we
 114          * just allocated rather than an imaginary chunk of memory
 115          * located at address 0.
 116          * 'dev_ctl' points to REAL memory, while the others are
 117          * ZERO based and thus need to be adjusted to point within
 118          * the allocated memory.
 119          */
 120         dev_inst = (struct edac_device_instance *)
 121                 (((char *)dev_ctl) + ((unsigned long)dev_inst));
 122         dev_blk = (struct edac_device_block *)
 123                 (((char *)dev_ctl) + ((unsigned long)dev_blk));
 124         dev_attrib = (struct edac_dev_sysfs_block_attribute *)
 125                 (((char *)dev_ctl) + ((unsigned long)dev_attrib));
 126         pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL;
 127 
 128         /* Begin storing the information into the control info structure */
 129         dev_ctl->dev_idx = device_index;
 130         dev_ctl->nr_instances = nr_instances;
 131         dev_ctl->instances = dev_inst;
 132         dev_ctl->pvt_info = pvt;
 133 
 134         /* Default logging of CEs and UEs */
 135         dev_ctl->log_ce = 1;
 136         dev_ctl->log_ue = 1;
 137 
 138         /* Name of this edac device */
 139         snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name);
 140 
 141         edac_dbg(4, "edac_dev=%p next after end=%p\n",
 142                  dev_ctl, pvt + sz_private);
 143 
 144         /* Initialize every Instance */
 145         for (instance = 0; instance < nr_instances; instance++) {
 146                 inst = &dev_inst[instance];
 147                 inst->ctl = dev_ctl;
 148                 inst->nr_blocks = nr_blocks;
 149                 blk_p = &dev_blk[instance * nr_blocks];
 150                 inst->blocks = blk_p;
 151 
 152                 /* name of this instance */
 153                 snprintf(inst->name, sizeof(inst->name),
 154                          "%s%u", edac_device_name, instance);
 155 
 156                 /* Initialize every block in each instance */
 157                 for (block = 0; block < nr_blocks; block++) {
 158                         blk = &blk_p[block];
 159                         blk->instance = inst;
 160                         snprintf(blk->name, sizeof(blk->name),
 161                                  "%s%d", edac_block_name, block+offset_value);
 162 
 163                         edac_dbg(4, "instance=%d inst_p=%p block=#%d block_p=%p name='%s'\n",
 164                                  instance, inst, block, blk, blk->name);
 165 
 166                         /* if there are NO attributes OR no attribute pointer
 167                          * then continue on to next block iteration
 168                          */
 169                         if ((nr_attrib == 0) || (attrib_spec == NULL))
 170                                 continue;
 171 
 172                         /* setup the attribute array for this block */
 173                         blk->nr_attribs = nr_attrib;
 174                         attrib_p = &dev_attrib[block*nr_instances*nr_attrib];
 175                         blk->block_attributes = attrib_p;
 176 
 177                         edac_dbg(4, "THIS BLOCK_ATTRIB=%p\n",
 178                                  blk->block_attributes);
 179 
 180                         /* Initialize every user specified attribute in this
 181                          * block with the data the caller passed in
 182                          * Each block gets its own copy of pointers,
 183                          * and its unique 'value'
 184                          */
 185                         for (attr = 0; attr < nr_attrib; attr++) {
 186                                 attrib = &attrib_p[attr];
 187 
 188                                 /* populate the unique per attrib
 189                                  * with the code pointers and info
 190                                  */
 191                                 attrib->attr = attrib_spec[attr].attr;
 192                                 attrib->show = attrib_spec[attr].show;
 193                                 attrib->store = attrib_spec[attr].store;
 194 
 195                                 attrib->block = blk;    /* up link */
 196 
 197                                 edac_dbg(4, "alloc-attrib=%p attrib_name='%s' attrib-spec=%p spec-name=%s\n",
 198                                          attrib, attrib->attr.name,
 199                                          &attrib_spec[attr],
 200                                          attrib_spec[attr].attr.name
 201                                         );
 202                         }
 203                 }
 204         }
 205 
 206         /* Mark this instance as merely ALLOCATED */
 207         dev_ctl->op_state = OP_ALLOC;
 208 
 209         /*
 210          * Initialize the 'root' kobj for the edac_device controller
 211          */
 212         err = edac_device_register_sysfs_main_kobj(dev_ctl);
 213         if (err) {
 214                 kfree(dev_ctl);
 215                 return NULL;
 216         }
 217 
 218         /* at this point, the root kobj is valid, and in order to
 219          * 'free' the object, then the function:
 220          *      edac_device_unregister_sysfs_main_kobj() must be called
 221          * which will perform kobj unregistration and the actual free
 222          * will occur during the kobject callback operation
 223          */
 224 
 225         return dev_ctl;
 226 }
 227 EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info);
 228 
 229 void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info)
 230 {
 231         edac_device_unregister_sysfs_main_kobj(ctl_info);
 232 }
 233 EXPORT_SYMBOL_GPL(edac_device_free_ctl_info);
 234 
 235 /*
 236  * find_edac_device_by_dev
 237  *      scans the edac_device list for a specific 'struct device *'
 238  *
 239  *      lock to be held prior to call:  device_ctls_mutex
 240  *
 241  *      Return:
 242  *              pointer to control structure managing 'dev'
 243  *              NULL if not found on list
 244  */
 245 static struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev)
 246 {
 247         struct edac_device_ctl_info *edac_dev;
 248         struct list_head *item;
 249 
 250         edac_dbg(0, "\n");
 251 
 252         list_for_each(item, &edac_device_list) {
 253                 edac_dev = list_entry(item, struct edac_device_ctl_info, link);
 254 
 255                 if (edac_dev->dev == dev)
 256                         return edac_dev;
 257         }
 258 
 259         return NULL;
 260 }
 261 
 262 /*
 263  * add_edac_dev_to_global_list
 264  *      Before calling this function, caller must
 265  *      assign a unique value to edac_dev->dev_idx.
 266  *
 267  *      lock to be held prior to call:  device_ctls_mutex
 268  *
 269  *      Return:
 270  *              0 on success
 271  *              1 on failure.
 272  */
 273 static int add_edac_dev_to_global_list(struct edac_device_ctl_info *edac_dev)
 274 {
 275         struct list_head *item, *insert_before;
 276         struct edac_device_ctl_info *rover;
 277 
 278         insert_before = &edac_device_list;
 279 
 280         /* Determine if already on the list */
 281         rover = find_edac_device_by_dev(edac_dev->dev);
 282         if (unlikely(rover != NULL))
 283                 goto fail0;
 284 
 285         /* Insert in ascending order by 'dev_idx', so find position */
 286         list_for_each(item, &edac_device_list) {
 287                 rover = list_entry(item, struct edac_device_ctl_info, link);
 288 
 289                 if (rover->dev_idx >= edac_dev->dev_idx) {
 290                         if (unlikely(rover->dev_idx == edac_dev->dev_idx))
 291                                 goto fail1;
 292 
 293                         insert_before = item;
 294                         break;
 295                 }
 296         }
 297 
 298         list_add_tail_rcu(&edac_dev->link, insert_before);
 299         return 0;
 300 
 301 fail0:
 302         edac_printk(KERN_WARNING, EDAC_MC,
 303                         "%s (%s) %s %s already assigned %d\n",
 304                         dev_name(rover->dev), edac_dev_name(rover),
 305                         rover->mod_name, rover->ctl_name, rover->dev_idx);
 306         return 1;
 307 
 308 fail1:
 309         edac_printk(KERN_WARNING, EDAC_MC,
 310                         "bug in low-level driver: attempt to assign\n"
 311                         "    duplicate dev_idx %d in %s()\n", rover->dev_idx,
 312                         __func__);
 313         return 1;
 314 }
 315 
 316 /*
 317  * del_edac_device_from_global_list
 318  */
 319 static void del_edac_device_from_global_list(struct edac_device_ctl_info
 320                                                 *edac_device)
 321 {
 322         list_del_rcu(&edac_device->link);
 323 
 324         /* these are for safe removal of devices from global list while
 325          * NMI handlers may be traversing list
 326          */
 327         synchronize_rcu();
 328         INIT_LIST_HEAD(&edac_device->link);
 329 }
 330 
 331 /*
 332  * edac_device_workq_function
 333  *      performs the operation scheduled by a workq request
 334  *
 335  *      this workq is embedded within an edac_device_ctl_info
 336  *      structure, that needs to be polled for possible error events.
 337  *
 338  *      This operation is to acquire the list mutex lock
 339  *      (thus preventing insertation or deletion)
 340  *      and then call the device's poll function IFF this device is
 341  *      running polled and there is a poll function defined.
 342  */
 343 static void edac_device_workq_function(struct work_struct *work_req)
 344 {
 345         struct delayed_work *d_work = to_delayed_work(work_req);
 346         struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
 347 
 348         mutex_lock(&device_ctls_mutex);
 349 
 350         /* If we are being removed, bail out immediately */
 351         if (edac_dev->op_state == OP_OFFLINE) {
 352                 mutex_unlock(&device_ctls_mutex);
 353                 return;
 354         }
 355 
 356         /* Only poll controllers that are running polled and have a check */
 357         if ((edac_dev->op_state == OP_RUNNING_POLL) &&
 358                 (edac_dev->edac_check != NULL)) {
 359                         edac_dev->edac_check(edac_dev);
 360         }
 361 
 362         mutex_unlock(&device_ctls_mutex);
 363 
 364         /* Reschedule the workq for the next time period to start again
 365          * if the number of msec is for 1 sec, then adjust to the next
 366          * whole one second to save timers firing all over the period
 367          * between integral seconds
 368          */
 369         if (edac_dev->poll_msec == 1000)
 370                 edac_queue_work(&edac_dev->work, round_jiffies_relative(edac_dev->delay));
 371         else
 372                 edac_queue_work(&edac_dev->work, edac_dev->delay);
 373 }
 374 
 375 /*
 376  * edac_device_workq_setup
 377  *      initialize a workq item for this edac_device instance
 378  *      passing in the new delay period in msec
 379  */
 380 static void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev,
 381                                     unsigned msec)
 382 {
 383         edac_dbg(0, "\n");
 384 
 385         /* take the arg 'msec' and set it into the control structure
 386          * to used in the time period calculation
 387          * then calc the number of jiffies that represents
 388          */
 389         edac_dev->poll_msec = msec;
 390         edac_dev->delay = msecs_to_jiffies(msec);
 391 
 392         INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
 393 
 394         /* optimize here for the 1 second case, which will be normal value, to
 395          * fire ON the 1 second time event. This helps reduce all sorts of
 396          * timers firing on sub-second basis, while they are happy
 397          * to fire together on the 1 second exactly
 398          */
 399         if (edac_dev->poll_msec == 1000)
 400                 edac_queue_work(&edac_dev->work, round_jiffies_relative(edac_dev->delay));
 401         else
 402                 edac_queue_work(&edac_dev->work, edac_dev->delay);
 403 }
 404 
 405 /*
 406  * edac_device_workq_teardown
 407  *      stop the workq processing on this edac_dev
 408  */
 409 static void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev)
 410 {
 411         if (!edac_dev->edac_check)
 412                 return;
 413 
 414         edac_dev->op_state = OP_OFFLINE;
 415 
 416         edac_stop_work(&edac_dev->work);
 417 }
 418 
 419 /*
 420  * edac_device_reset_delay_period
 421  *
 422  *      need to stop any outstanding workq queued up at this time
 423  *      because we will be resetting the sleep time.
 424  *      Then restart the workq on the new delay
 425  */
 426 void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
 427                                         unsigned long value)
 428 {
 429         unsigned long jiffs = msecs_to_jiffies(value);
 430 
 431         if (value == 1000)
 432                 jiffs = round_jiffies_relative(value);
 433 
 434         edac_dev->poll_msec = value;
 435         edac_dev->delay     = jiffs;
 436 
 437         edac_mod_work(&edac_dev->work, jiffs);
 438 }
 439 
 440 int edac_device_alloc_index(void)
 441 {
 442         static atomic_t device_indexes = ATOMIC_INIT(0);
 443 
 444         return atomic_inc_return(&device_indexes) - 1;
 445 }
 446 EXPORT_SYMBOL_GPL(edac_device_alloc_index);
 447 
 448 int edac_device_add_device(struct edac_device_ctl_info *edac_dev)
 449 {
 450         edac_dbg(0, "\n");
 451 
 452 #ifdef CONFIG_EDAC_DEBUG
 453         if (edac_debug_level >= 3)
 454                 edac_device_dump_device(edac_dev);
 455 #endif
 456         mutex_lock(&device_ctls_mutex);
 457 
 458         if (add_edac_dev_to_global_list(edac_dev))
 459                 goto fail0;
 460 
 461         /* set load time so that error rate can be tracked */
 462         edac_dev->start_time = jiffies;
 463 
 464         /* create this instance's sysfs entries */
 465         if (edac_device_create_sysfs(edac_dev)) {
 466                 edac_device_printk(edac_dev, KERN_WARNING,
 467                                         "failed to create sysfs device\n");
 468                 goto fail1;
 469         }
 470 
 471         /* If there IS a check routine, then we are running POLLED */
 472         if (edac_dev->edac_check != NULL) {
 473                 /* This instance is NOW RUNNING */
 474                 edac_dev->op_state = OP_RUNNING_POLL;
 475 
 476                 /*
 477                  * enable workq processing on this instance,
 478                  * default = 1000 msec
 479                  */
 480                 edac_device_workq_setup(edac_dev, 1000);
 481         } else {
 482                 edac_dev->op_state = OP_RUNNING_INTERRUPT;
 483         }
 484 
 485         /* Report action taken */
 486         edac_device_printk(edac_dev, KERN_INFO,
 487                 "Giving out device to module %s controller %s: DEV %s (%s)\n",
 488                 edac_dev->mod_name, edac_dev->ctl_name, edac_dev->dev_name,
 489                 edac_op_state_to_string(edac_dev->op_state));
 490 
 491         mutex_unlock(&device_ctls_mutex);
 492         return 0;
 493 
 494 fail1:
 495         /* Some error, so remove the entry from the lsit */
 496         del_edac_device_from_global_list(edac_dev);
 497 
 498 fail0:
 499         mutex_unlock(&device_ctls_mutex);
 500         return 1;
 501 }
 502 EXPORT_SYMBOL_GPL(edac_device_add_device);
 503 
 504 struct edac_device_ctl_info *edac_device_del_device(struct device *dev)
 505 {
 506         struct edac_device_ctl_info *edac_dev;
 507 
 508         edac_dbg(0, "\n");
 509 
 510         mutex_lock(&device_ctls_mutex);
 511 
 512         /* Find the structure on the list, if not there, then leave */
 513         edac_dev = find_edac_device_by_dev(dev);
 514         if (edac_dev == NULL) {
 515                 mutex_unlock(&device_ctls_mutex);
 516                 return NULL;
 517         }
 518 
 519         /* mark this instance as OFFLINE */
 520         edac_dev->op_state = OP_OFFLINE;
 521 
 522         /* deregister from global list */
 523         del_edac_device_from_global_list(edac_dev);
 524 
 525         mutex_unlock(&device_ctls_mutex);
 526 
 527         /* clear workq processing on this instance */
 528         edac_device_workq_teardown(edac_dev);
 529 
 530         /* Tear down the sysfs entries for this instance */
 531         edac_device_remove_sysfs(edac_dev);
 532 
 533         edac_printk(KERN_INFO, EDAC_MC,
 534                 "Removed device %d for %s %s: DEV %s\n",
 535                 edac_dev->dev_idx,
 536                 edac_dev->mod_name, edac_dev->ctl_name, edac_dev_name(edac_dev));
 537 
 538         return edac_dev;
 539 }
 540 EXPORT_SYMBOL_GPL(edac_device_del_device);
 541 
 542 static inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev)
 543 {
 544         return edac_dev->log_ce;
 545 }
 546 
 547 static inline int edac_device_get_log_ue(struct edac_device_ctl_info *edac_dev)
 548 {
 549         return edac_dev->log_ue;
 550 }
 551 
 552 static inline int edac_device_get_panic_on_ue(struct edac_device_ctl_info
 553                                         *edac_dev)
 554 {
 555         return edac_dev->panic_on_ue;
 556 }
 557 
 558 void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
 559                         int inst_nr, int block_nr, const char *msg)
 560 {
 561         struct edac_device_instance *instance;
 562         struct edac_device_block *block = NULL;
 563 
 564         if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
 565                 edac_device_printk(edac_dev, KERN_ERR,
 566                                 "INTERNAL ERROR: 'instance' out of range "
 567                                 "(%d >= %d)\n", inst_nr,
 568                                 edac_dev->nr_instances);
 569                 return;
 570         }
 571 
 572         instance = edac_dev->instances + inst_nr;
 573 
 574         if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
 575                 edac_device_printk(edac_dev, KERN_ERR,
 576                                 "INTERNAL ERROR: instance %d 'block' "
 577                                 "out of range (%d >= %d)\n",
 578                                 inst_nr, block_nr,
 579                                 instance->nr_blocks);
 580                 return;
 581         }
 582 
 583         if (instance->nr_blocks > 0) {
 584                 block = instance->blocks + block_nr;
 585                 block->counters.ce_count++;
 586         }
 587 
 588         /* Propagate the count up the 'totals' tree */
 589         instance->counters.ce_count++;
 590         edac_dev->counters.ce_count++;
 591 
 592         if (edac_device_get_log_ce(edac_dev))
 593                 edac_device_printk(edac_dev, KERN_WARNING,
 594                                 "CE: %s instance: %s block: %s '%s'\n",
 595                                 edac_dev->ctl_name, instance->name,
 596                                 block ? block->name : "N/A", msg);
 597 }
 598 EXPORT_SYMBOL_GPL(edac_device_handle_ce);
 599 
 600 void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
 601                         int inst_nr, int block_nr, const char *msg)
 602 {
 603         struct edac_device_instance *instance;
 604         struct edac_device_block *block = NULL;
 605 
 606         if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
 607                 edac_device_printk(edac_dev, KERN_ERR,
 608                                 "INTERNAL ERROR: 'instance' out of range "
 609                                 "(%d >= %d)\n", inst_nr,
 610                                 edac_dev->nr_instances);
 611                 return;
 612         }
 613 
 614         instance = edac_dev->instances + inst_nr;
 615 
 616         if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
 617                 edac_device_printk(edac_dev, KERN_ERR,
 618                                 "INTERNAL ERROR: instance %d 'block' "
 619                                 "out of range (%d >= %d)\n",
 620                                 inst_nr, block_nr,
 621                                 instance->nr_blocks);
 622                 return;
 623         }
 624 
 625         if (instance->nr_blocks > 0) {
 626                 block = instance->blocks + block_nr;
 627                 block->counters.ue_count++;
 628         }
 629 
 630         /* Propagate the count up the 'totals' tree */
 631         instance->counters.ue_count++;
 632         edac_dev->counters.ue_count++;
 633 
 634         if (edac_device_get_log_ue(edac_dev))
 635                 edac_device_printk(edac_dev, KERN_EMERG,
 636                                 "UE: %s instance: %s block: %s '%s'\n",
 637                                 edac_dev->ctl_name, instance->name,
 638                                 block ? block->name : "N/A", msg);
 639 
 640         if (edac_device_get_panic_on_ue(edac_dev))
 641                 panic("EDAC %s: UE instance: %s block %s '%s'\n",
 642                         edac_dev->ctl_name, instance->name,
 643                         block ? block->name : "N/A", msg);
 644 }
 645 EXPORT_SYMBOL_GPL(edac_device_handle_ue);