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powerpc/pseries: dynamically added OF nodes need to call of_node_init 

Commit 75b57ecf9 refactored device tree nodes to use kobjects such that they
can be exposed via /sysfs. A secondary commit 0829f6d1f furthered this rework
by moving the kobect initialization logic out of of_node_add into its own
of_node_init function. The inital commit removed the existing kref_init calls
in the pseries dlpar code with the assumption kobject initialization would
occur in of_node_add. The second commit had the side effect of triggering a
BUG_ON during DLPAR, migration and suspend/resume operations as a result of
dynamically added nodes being uninitialized.

This patch fixes this by adding of_node_init calls in place of the previously
removed kref_init calls.

Fixes: 0829f6d1f6 ("of: device_node kobject lifecycle fixes")
Cc: stable@vger.kernel.org
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Acked-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Tyrel Datwyler 2014-07-10 14:50:57 -04:00 committed by Benjamin Herrenschmidt
parent dad6f37c26
commit 97a9a7179a
2 changed files with 2 additions and 0 deletions
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1
arch/powerpc/platforms/pseries/dlpar.c
View File

@ -86,6 +86,7 @@ static struct device_node *dlpar_parse_cc_node(struct cc_workarea *ccwa,
}
of_node_set_flag(dn, OF_DYNAMIC);
of_node_init(dn);
return dn;
}

1
arch/powerpc/platforms/pseries/reconfig.c
View File

@ -69,6 +69,7 @@ static int pSeries_reconfig_add_node(const char *path, struct property *proplist
np->properties = proplist;
of_node_set_flag(np, OF_DYNAMIC);
of_node_init(np);
np->parent = derive_parent(path);
if (IS_ERR(np->parent)) {