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of: Improve prom_update_property() function

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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 <[email protected]>
Signed-off-by: Dong Aisheng <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
This commit is contained in:
Dong Aisheng 2012-07-11 15:16:37 +10:00 • committed by Benjamin Herrenschmidt
commit 475d009429
6 changed files with 25 additions and 30 deletions
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15
drivers/of/base.c
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@ -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) {