Commit 40fbb915 authored by Sascha Hauer's avatar Sascha Hauer Committed by Marcel Holtmann
Browse files

Bluetooth: hci_ldisc: Add function to wait for characters to be sent 



The hci UART line discipline sends its characters in a workqueue. Some
devices like the Marvell Bluetooth chips need to make sure that all
queued characters are sent before switching the baudrate. This adds
a function to synchronize with the workqueue.

Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent db50450d

drivers/bluetooth/hci_ldisc.c

+8 −0
Original line number Diff line number Diff line
@@ -178,6 +178,7 @@ restart: 
		goto restart;



	clear_bit(HCI_UART_SENDING, &hu->tx_state);

	wake_up_bit(&hu->tx_state, HCI_UART_SENDING);

}



void hci_uart_init_work(struct work_struct *work)
@@ -213,6 +214,13 @@ int hci_uart_init_ready(struct hci_uart *hu) 
	return 0;

}



int hci_uart_wait_until_sent(struct hci_uart *hu)

{

	return wait_on_bit_timeout(&hu->tx_state, HCI_UART_SENDING,

				   TASK_INTERRUPTIBLE,

				   msecs_to_jiffies(2000));

}



/* ------- Interface to HCI layer ------ */

/* Reset device */

static int hci_uart_flush(struct hci_dev *hdev)

drivers/bluetooth/hci_uart.h

+1 −0
Original line number Diff line number Diff line
@@ -100,6 +100,7 @@ int hci_uart_register_device(struct hci_uart *hu, const struct hci_uart_proto *p 
void hci_uart_unregister_device(struct hci_uart *hu);



int hci_uart_tx_wakeup(struct hci_uart *hu);

int hci_uart_wait_until_sent(struct hci_uart *hu);

int hci_uart_init_ready(struct hci_uart *hu);

void hci_uart_init_work(struct work_struct *work);

void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);

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