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drivers: base: swnode: check if pointer p is NULL before dereferencing it

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The pointer p can be potentially NULL as macro to_software_node can
return NULL.

Add null check on p before dereferencing it to avoid any NULL pointer
dereferences.

Detected by CoverityScan, CID#1476039 ("Explicit null dereferenced")

Fixes: 59abd83672 (drivers: base: Introducing software nodes to the firmware node framework)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Colin Ian King 2018-12-22 12:49:39 +00:00 committed by Rafael J. Wysocki
parent d8924c0d76
commit 1d8f062ebc
1 changed files with 1 additions and 1 deletions
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2
drivers/base/swnode.c
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@ -487,7 +487,7 @@ software_node_get_next_child(const struct fwnode_handle *fwnode,
struct software_node *p = to_software_node(fwnode);
struct software_node *c = to_software_node(child);
if (list_empty(&p->children) ||
if (!p || list_empty(&p->children) ||
(c && list_is_last(&c->entry, &p->children)))
return NULL;