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| author | Michael Ellerman <michael@ellerman.id.au> | 2007-06-19 08:07:56 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-07-10 13:53:45 +0200 |
| commit | 972d17c9dbad378da61baa17f4c3ea6e154b186a (patch) | |
| tree | 0e8fb037ceaafbb77a9a66001a4ebeb5ec454217 /arch/powerpc/kernel/prom.c | |
| parent | [POWERPC] Add cputable entry for PowerPC 440SPe Rev. B (diff) | |
| download | linux-972d17c9dbad378da61baa17f4c3ea6e154b186a.tar.xz linux-972d17c9dbad378da61baa17f4c3ea6e154b186a.zip | |
[POWERPC] Check for the root node in of_detach_node()
It's not sensible to call of_detach_node() on the root node,
but we should check for it just to be safe.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/prom.c')
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 6f32bebd8a9b..cc9632c7149e 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -1432,6 +1432,8 @@ void of_detach_node(const struct device_node *np) write_lock(&devtree_lock); parent = np->parent; + if (!parent) + goto out_unlock; if (allnodes == np) allnodes = np->allnext; @@ -1455,6 +1457,7 @@ void of_detach_node(const struct device_node *np) prevsib->sibling = np->sibling; } +out_unlock: write_unlock(&devtree_lock); } |