Eric Lee / smarc-ti-linux-kernel

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Commit bf0c55c986540483c34ca640f2eef4c3314388b1

Authored by Slava Pestov
Committed by Kent Overstreet
1 parent d83353b319
Exists in ti-lsk-linux-4.1.y and in 10 other branches dlt-processor-sdk-linux-03.00.00.04, processor-sdk-linux-02.00.01, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04

bcache: fix crash with incomplete cache set 

Change-Id: I6abde52afe917633480caaf4e2518f42a816d886

Showing 2 changed files with 8 additions and 0 deletions Side-by-side Diff

drivers/md/bcache/bcache.h
Diff comments   View file @ bf0c55c
... ... @@ -477,9 +477,13 @@
477 477 * CACHE_SET_STOPPING always gets set first when we're closing down a cache set;
478 478 * we'll continue to run normally for awhile with CACHE_SET_STOPPING set (i.e.
479 479 * flushing dirty data).
  480 + *
  481 + * CACHE_SET_RUNNING means all cache devices have been registered and journal
  482 + * replay is complete.
480 483 */
481 484 #define CACHE_SET_UNREGISTERING 0
482 485 #define CACHE_SET_STOPPING 1
  486 +#define CACHE_SET_RUNNING 2
483 487  
484 488 struct cache_set {
485 489 struct closure cl;
drivers/md/bcache/super.c
Diff comments   View file @ bf0c55c
... ... @@ -1284,6 +1284,9 @@
1284 1284 if (test_bit(CACHE_SET_STOPPING, &c->flags))
1285 1285 return -EINTR;
1286 1286  
  1287 + if (!test_bit(CACHE_SET_RUNNING, &c->flags))
  1288 + return -EPERM;
  1289 +
1287 1290 u = uuid_find_empty(c);
1288 1291 if (!u) {
1289 1292 pr_err("Can't create volume, no room for UUID");
... ... @@ -1706,6 +1709,7 @@
1706 1709  
1707 1710 flash_devs_run(c);
1708 1711  
  1712 + set_bit(CACHE_SET_RUNNING, &c->flags);
1709 1713 return;
1710 1714 err:
1711 1715 closure_sync(&cl);