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Commit 6dd54590 authored by Pantelis Antoniou's avatar Pantelis Antoniou Committed by Alex Shi
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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: default avatarPantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: default avatarGrant Likely <grant.likely@linaro.org>
(cherry picked from commit 15204ab1ebc5aba608cd19c83c37b98438b938b0)
Signed-off-by: default avatarAlex Shi <alex.shi@linaro.org>
parent 787716e2

drivers/of/platform.c

+9 −0
Original line number Diff line number Diff line
@@ -564,6 +564,10 @@ 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,
@@ -579,6 +583,11 @@ 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)