This is a note to let you know that I've just added the patch titled
w1 - call request_module with w1 master mutex unlocked
to the 3.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
w1-call-request_module-with-w1-master-mutex-unlocked.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From bc04d76d6942068f75c10790072280b847ec6f1f Mon Sep 17 00:00:00 2001
From: Hans-Frieder Vogt <[email protected]>
Date: Sun, 6 Oct 2013 21:13:40 +0200
Subject: w1 - call request_module with w1 master mutex unlocked
From: Hans-Frieder Vogt <[email protected]>
commit bc04d76d6942068f75c10790072280b847ec6f1f upstream.
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]>
Acked-by: Evgeniy Polyakov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/w1/w1.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -680,7 +680,10 @@ 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);
Patches currently in stable-queue which might be from [email protected] are
queue-3.11/w1-call-request_module-with-w1-master-mutex-unlocked.patch
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