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| author | Dong Aisheng <dong.aisheng@linaro.org> | 2012-07-11 09:16:37 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-07-11 09:26:51 +0400 |
| commit | 475d0094293b51353e342d1198377967dbc48169 (patch) | |
| tree | b10a01706dd433b93353600a00491ce62e385ec9 /drivers/of | |
| parent | b416c9a10baae6a177b4f9ee858b8d309542fbef (diff) | |
| download | linux-475d0094293b51353e342d1198377967dbc48169.tar.xz | |
of: Improve prom_update_property() function
prom_update_property() currently fails if the property doesn't
actually exist yet which isn't what we want. Change to add-or-update
instead of update-only, then we can remove a lot duplicated lines.
Suggested-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/base.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index eada3f4ef801..bc86ea2af668 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -1073,7 +1073,8 @@ int prom_remove_property(struct device_node *np, struct property *prop) } /* - * prom_update_property - Update a property in a node. + * prom_update_property - Update a property in a node, if the property does + * not exist, add it. * * Note that we don't actually remove it, since we have given out * who-knows-how-many pointers to the data using get-property. @@ -1081,13 +1082,19 @@ int prom_remove_property(struct device_node *np, struct property *prop) * and add the new property to the property list */ int prom_update_property(struct device_node *np, - struct property *newprop, - struct property *oldprop) + struct property *newprop) { - struct property **next; + struct property **next, *oldprop; unsigned long flags; int found = 0; + if (!newprop->name) + return -EINVAL; + + oldprop = of_find_property(np, newprop->name, NULL); + if (!oldprop) + return prom_add_property(np, newprop); + write_lock_irqsave(&devtree_lock, flags); next = &np->properties; while (*next) { |