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Bluetooth: Fix possible NULL dereference in hci_uart_tty_receive 

This patch adds a NULL check for the HCI UART ldisc driver because some
of HCI UART drivers allow hci_uart_tty_receive function to be called
even though the HCI device hasn't been registered yet.

Signed-off-by: Chan-yeol Park <chanyeol.park@samsung.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
hifive-unleashed-5.1
Chan-yeol Park 2013-04-02 21:24:22 +09:00 committed by Johan Hedberg
parent c257820291
commit 788f0923d3
1 changed files with 4 additions and 1 deletions
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5
drivers/bluetooth/hci_ldisc.c
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@ -388,7 +388,10 @@ static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *f
spin_lock(&hu->rx_lock);
hu->proto->recv(hu, (void *) data, count);
hu->hdev->stat.byte_rx += count;
if (hu->hdev)
hu->hdev->stat.byte_rx += count;
spin_unlock(&hu->rx_lock);
tty_unthrottle(tty);