request_module for w1 slave modules needs to be called with the w1 master mutex unlocked. Because w1_attach_slave_device gets always(?) called with mutex locked, we need to temporarily unlock the w1 master mutex for the loading of the w1 slave module.
Signed-off by: Hans-Frieder Vogt <[email protected]> --- drivers/w1/w1.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/w1/w1.c 2013-10-06 14:58:45.246528318 +0200 +++ b/drivers/w1/w1.c 2013-10-06 19:13:04.115279322 +0200 @@ -716,7 +716,10 @@ static int w1_attach_slave_device(struct atomic_set(&sl->refcnt, 0); init_completion(&sl->released); + /* slave modules need to be loaded in a context with unlocked mutex */ + mutex_unlock(&dev->mutex); request_module("w1-family-0x%0x", rn->family); + mutex_lock(&dev->mutex); spin_lock(&w1_flock); f = w1_family_registered(rn->family); Hans-Frieder Vogt e-mail: hfvogt <at> gmx .dot. net -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
