[patch v11 11/12] platform/mellanox: mlxreg-hotplug: Add check for negative adapter number value

[Vadim Pasternak]

Verify before creation of hotplug device if the associated adapter number
is negative. It could be in case hotplug event is not associated with
hotplug device.

Signed-off-by: Vadim Pasternak <vadimp@xxxxxxxxxxxx>
---
 drivers/platform/mellanox/mlxreg-hotplug.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/platform/mellanox/mlxreg-hotplug.c b/drivers/platform/mellanox/mlxreg-hotplug.c
index b891ec7..c806451 100644
--- a/drivers/platform/mellanox/mlxreg-hotplug.c
+++ b/drivers/platform/mellanox/mlxreg-hotplug.c
@@ -95,6 +95,14 @@ struct mlxreg_hotplug_priv_data {
 
 static int mlxreg_hotplug_device_create(struct mlxreg_core_data *data)
 {
+	/*
+	 * Return if adapter number is negative. Return if adapter number is
+	 * negative. It could be in case hotplug event is not associated with
+	 * hotplug device.
+	 */
+	if (data->hpdev.nr < 0)
+		return 0;
+
 	data->hpdev.adapter = i2c_get_adapter(data->hpdev.nr);
 	if (!data->hpdev.adapter)
 		return -EFAULT;
-- 
2.1.4