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| author |   Frederic Danis <frederic.danis@linux.intel.com> | 2015-09-23 18:18:10 +0200 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2015-09-24 16:25:44 +0200 |
| commit | 7649faff1cfe4f76dabf78cd53d659d39f65b3c1 (patch) | |
| tree | 6a7c94c698155ec951247af76fce02b9b98c629e /drivers/bluetooth/hci_uart.h | |
| parent | Bluetooth: hci_bcm: Prepare PM runtime support (diff) | |
| download | linux-dev-7649faff1cfe4f76dabf78cd53d659d39f65b3c1.tar.xz linux-dev-7649faff1cfe4f76dabf78cd53d659d39f65b3c1.zip | |
Bluetooth: Remove useless rx_lock spinlock
rx_lock spinlock is only used in hci_uart_tty_receive() which is the
receive_buf ldisc callback.
hci_uart_tty_receive() is protected from re-entrance by its only
caller (flush_to_ldisc() in drivers/tty/tty_buffer.c) which held a
mutex (buf->lock) for this section.
This lock allows "safe use of the line discipline's receive_buf()
method by excluding the buffer work and any pending flush from using
the flip buffer." (comments from tty_buffer_lock_exclusive() in
drivers/tty/tty_buffer.c)
So, no need to double protect this resource with rx_lock.
Signed-off-by: Frederic Danis <frederic.danis@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth/hci_uart.h')
| -rw-r--r-- | drivers/bluetooth/hci_uart.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h index 495b9ef52bb0..2f7bb35a890e 100644 --- a/drivers/bluetooth/hci_uart.h +++ b/drivers/bluetooth/hci_uart.h @@ -85,7 +85,6 @@ struct hci_uart { struct sk_buff *tx_skb; unsigned long tx_state; - spinlock_t rx_lock; unsigned int init_speed; unsigned int oper_speed; |