[PATCH AUTOSEL 3.18 49/98] drivers: bus: check cci device tree node status

From: Sasha Levin
Date: Thu Oct 25 2018 - 10:20:14 EST

From: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>

[ Upstream commit 896ddd600ba4a3426aeb11710ae9c28dd7ce68ce ]

The arm-cci driver completes the probe sequence even if the cci node is
marked as disabled. Add a check in the driver to honour the cci status
in the device tree.

Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
Acked-by: Sudeep Holla <sudeep.holla@xxxxxxx>
Acked-by: Nicolas Pitre <nico@xxxxxxxxxx>
Tested-by: Sudeep Holla <sudeep.holla@xxxxxxx>
Tested-by: Kevin Hilman <khilman@xxxxxxxxxx>
Signed-off-by: Olof Johansson <olof@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/bus/arm-cci.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 7af78df241f2..99cad3ac38f2 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -976,6 +976,9 @@ static int cci_probe(void)
if (!np)
return -ENODEV;

+ if (!of_device_is_available(np))
+ return -ENODEV;
cci_config = of_match_node(arm_cci_matches, np)->data;
if (!cci_config)
return -ENODEV;