From: Vadim Pasternak <vadimp@mellanox.com>
Date: Fri, 26 Jan 2018 19:03:45 +0000
Subject: platform/mellanox: mlxreg-hotplug: Add check for negative adapter
number
Patch-mainline: v4.16-rc1
Git-commit: 7805fa8d78d0ea8c9c5a6603960e8f23901c7f17
References: bsc#1112374
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/platform/mellanox/mlxreg-hotplug.c | 7 +++++++
1 file changed, 7 insertions(+)
--- 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",