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i2c: Clear i2c_adapter.dev on adapter removal

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Clear i2c_adapter.dev on adapter removal. This makes it possible to
re-add the adapter at a later point, which some drivers
(i2c-amd756-s4882, i2c-nforce2-s4985) actually do.

This fixes a bug reported by John Stultz here:
  http://lkml.org/lkml/2008/7/15/720
and by Ingo Molar there:
  http://lkml.org/lkml/2008/7/16/78

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jean Delvare 2008-07-16 19:30:05 +02:00 • committed by Jean Delvare
parent 45158894d4
commit bd4bc3dbde
3 changed files with 32 additions and 30 deletions
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4
drivers/i2c/i2c-core.c
View file

@ -654,6 +654,10 @@ int i2c_del_adapter(struct i2c_adapter *adap)
dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);
/* Clear the device structure in case this adapter is ever going to be
added again */
memset(&adap->dev, 0, sizeof(adap->dev));
out_unlock:
mutex_unlock(&core_lock);
return res;