Hello Abhishek Pandit-Subedi, The patch a228f7a41029: "Bluetooth: hci_qca: Enable WBS support for wcn3991" from May 14, 2020, leads to the following static checker warning: drivers/bluetooth/hci_qca.c:1960 qca_serdev_probe() error: uninitialized symbol 'hdev'. drivers/bluetooth/hci_qca.c 1948 } 1949 1950 if (power_ctrl_enabled) { 1951 hdev = qcadev->serdev_hu.hdev; ^^^^ hdev is only initialized here. 1952 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); 1953 hdev->shutdown = qca_power_off; 1954 } 1955 1956 /* Wideband speech support must be set per driver since it can't be 1957 * queried via hci. 1958 */ 1959 if (data && (data->capabilities & QCA_CAP_WIDEBAND_SPEECH)) 1960 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks); ^^^^ Potentially uninitialized here. 1961 1962 return 0; 1963 } regards, dan carpenter