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-rw-r--r--drivers/w1/w1.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 0781217d2396..fa932c2f7d97 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -716,7 +716,10 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn)
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);