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Message-ID: <539D160E.5080208@gmail.com>
Date: Sat, 14 Jun 2014 20:42:06 -0700
From: Frank Rowand <frowand.list@...il.com>
To: frowand.list@...il.com
CC: Grant Likely <grant.likely@...aro.org>,
Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
Rob Herring <robherring2@...il.com>,
Rob Herring <robh+dt@...nel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] OF: fix of_find_node_by_path() assumption that of_allnodes
is root
On 6/14/2014 8:39 PM, Frank Rowand wrote:
> From: Frank Rowand <frank.rowand@...ymobile.com>
>
> of_find_node_by_path() is borked because of_allnodes is not guaranteed to
> contain the root of the tree after using any of the dynamic update functions
> because some other nodes ends up as of_allnodes.
>
> Fixes: c22e650e66b8 of: Make of_find_node_by_path() handle /aliases
> Reported-by: pantelis.antoniou@...sulko.com
> Signed-off-by: Frank Rowand <frank.rowand@...ymobile.com>
> ---
>
> v2:
> Remove change to function header, no longer needed.
> Remove BUG_ON(), no longer needed.
> Add np as np->parent->allnext instead of np->parent->allnext, as suggested
Aaaargh, cut and paste error, that should be:
Add np as np->parent->allnext instead of of_allnodes->allnext, as suggested
> by Grant Likely.
>
>
> drivers/of/base.c | 4 2 + 2 - 0 !
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> Index: b/drivers/of/base.c
> ===================================================================
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -1960,9 +1960,9 @@ int of_attach_node(struct device_node *n
>
> raw_spin_lock_irqsave(&devtree_lock, flags);
> np->sibling = np->parent->child;
> - np->allnext = of_allnodes;
> + np->allnext = np->parent->allnext;
> + np->parent->allnext = np;
> np->parent->child = np;
> - of_allnodes = np;
> of_node_clear_flag(np, OF_DETACHED);
> raw_spin_unlock_irqrestore(&devtree_lock, flags);
>
>
--
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