aboutsummaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorPantelis Antoniou <pantelis.antoniou@konsulko.com>2014-12-16 19:45:26 +0200
committerGrant Likely <grant.likely@linaro.org>2015-01-22 15:36:55 +0000
commit15204ab1ebc5aba608cd19c83c37b98438b938b0 (patch)
treec93f585003ba718061cbe066379206a3c1e761fc /drivers
parent3e7f7626fd49a9ffba8520a1a073f62929acad63 (diff)
downloadlinux-15204ab1ebc5aba608cd19c83c37b98438b938b0.tar.gz
of/platform: Handle of_populate drivers in notifier
When using overlays with drivers calling of_populate the notifier will try to create the device twice. Using the populated bit before proceeding protects against this. Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/of/platform.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index a54ec1087fd..b0d50d70a8a 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -566,6 +566,10 @@ static int of_platform_notify(struct notifier_block *nb,
if (!of_node_check_flag(rd->dn->parent, OF_POPULATED_BUS))
return NOTIFY_OK; /* not for us */
+ /* already populated? (driver using of_populate manually) */
+ if (of_node_check_flag(rd->dn, OF_POPULATED))
+ return NOTIFY_OK;
+
/* pdev_parent may be NULL when no bus platform device */
pdev_parent = of_find_device_by_node(rd->dn->parent);
pdev = of_platform_device_create(rd->dn, NULL,
@@ -581,6 +585,11 @@ static int of_platform_notify(struct notifier_block *nb,
break;
case OF_RECONFIG_CHANGE_REMOVE:
+
+ /* already depopulated? */
+ if (!of_node_check_flag(rd->dn, OF_POPULATED))
+ return NOTIFY_OK;
+
/* find our device by node */
pdev = of_find_device_by_node(rd->dn);
if (pdev == NULL)