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Bluetooth: hci_serdev: clear HCI_UART_PROTO_READY to avoid closing proto races

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[ Upstream commit 7cf7846d27bfc9731e449857db3eec5e0e9701ba ]

Clearing HCI_UART_PROTO_READY will avoid usage of proto function pointers
before running the proto close function pointer. There is chance of kernel
crash, due to usage of non proto close function pointers after proto close.

Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Balakrishna Godavarthi 2018-08-22 17:34:11 +05:30 committed by Greg Kroah-Hartman
parent a8d3a42686
commit 191e197524
1 changed files with 1 additions and 0 deletions
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drivers/bluetooth/hci_serdev.c
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@ -360,6 +360,7 @@ void hci_uart_unregister_device(struct hci_uart *hu)
{
struct hci_dev *hdev = hu->hdev;
clear_bit(HCI_UART_PROTO_READY, &hu->flags);
hci_unregister_dev(hdev);
hci_free_dev(hdev);