HID: amd_sfh: Handle condition of "no sensors"

[ Upstream commit 5d4d0f15657535f6a122ab26d47230b5c2b944af ]

Add a check for num_hid_devices to handle special case the situation
of "no sensors".

Fixes: 4b2c53d93a4b ("SFH:Transport Driver to add support of AMD Sensor Fusion Hub (SFH)")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
index 444acd9e2cd6a085846b0bc4562054c820df2762..8be33cf3b6c2398eff7dee8666e3041613c2748e 100644 (file)
--- a/drivers/hid/amd-sfh-hid/amd_sfh_client.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
@@ -155,6 +155,8 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
        dev = &privdata->pdev->dev;
 
        cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
+       if (cl_data->num_hid_devices == 0)
+               return -ENODEV;
 
        INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
        INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);