platform/mellanox: mlxreg-hotplug: Add check for negative adapter number

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@mellanox.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

diff --git a/drivers/platform/mellanox/mlxreg-hotplug.c b/drivers/platform/mellanox/mlxreg-hotplug.c
index bcb564fd9f046a99d4a8ce39a42dc79dbcaa7edf..0dfa1ca0d05b02179a45b0590ea7b809cfceab45 100644 (file)
--- a/drivers/platform/mellanox/mlxreg-hotplug.c
+++ b/drivers/platform/mellanox/mlxreg-hotplug.c
@@ -96,6 +96,13 @@ struct mlxreg_hotplug_priv_data {
 static int mlxreg_hotplug_device_create(struct device *dev,
                                        struct mlxreg_core_data *data)
 {
+       /*
+        * 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) {
                dev_err(dev, "Failed to get adapter for bus %d\n",