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| author | David Fries <david@fries.net> | 2008-10-16 07:04:38 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 20:21:49 +0200 |
| commit | c30c9b15187e977ab5928f7276e9dfcd8d6f9460 (patch) | |
| tree | d36d7513c5acf1d39f581625ffa5c1915ae5627f /drivers/w1/w1_family.h | |
| parent | drivers/char/tpm/tpm.c: fix error-path memory leak (diff) | |
| download | linux-c30c9b15187e977ab5928f7276e9dfcd8d6f9460.tar.xz linux-c30c9b15187e977ab5928f7276e9dfcd8d6f9460.zip | |
W1: fix deadlocks and remove w1_control_thread
w1_control_thread was removed which would wake up every second and process
newly registered family codes and complete some final cleanup for a
removed master. Those routines were moved to the threads that were
previously requesting those operations. A new function
w1_reconnect_slaves takes care of reconnecting existing slave devices when
a new family code is registered or removed. The removal case was missing
and would cause a deadlock waiting for the family code reference count to
decrease, which will now happen. A problem with registering a family code
was fixed. A slave device would be unattached if it wasn't yet claimed,
then attached at the end of the list, two unclaimed slaves would cause an
infinite loop.
The struct w1_bus_master.search now takes a pointer to the struct
w1_master device to avoid searching for it, which would have caused a
lock ordering deadlock with the removal of w1_control_thread.
Signed-off-by: David Fries <david@fries.net>
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/w1/w1_family.h')
| -rw-r--r-- | drivers/w1/w1_family.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h index ef1e1dafa19a..296a87edd922 100644 --- a/drivers/w1/w1_family.h +++ b/drivers/w1/w1_family.h @@ -63,6 +63,5 @@ void __w1_family_get(struct w1_family *); struct w1_family * w1_family_registered(u8); void w1_unregister_family(struct w1_family *); int w1_register_family(struct w1_family *); -void w1_reconnect_slaves(struct w1_family *f); #endif /* __W1_FAMILY_H */ |