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Bluetooth: Introduce a flags variable to Three-wire UART state

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This patch introduces a flags variable to the Three-wire UART state
struct and converts the two existing bools in the struct into flags.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Johan Hedberg 2012-07-16 16:12:19 +03:00 committed by Gustavo Padovan
parent afdc944c1b
commit e0482103c2
1 changed files with 15 additions and 11 deletions
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26
drivers/bluetooth/hci_h5.c
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@ -58,21 +58,27 @@
#define SLIP_ESC_DELIM 0xdc
#define SLIP_ESC_ESC 0xdd
/* H5 state flags */
enum {
H5_RX_ESC, /* SLIP escape mode */
H5_TX_ACK_REQ, /* Pending ack to send */
};
struct h5 {
struct sk_buff_head unack; /* Unack'ed packets queue */
struct sk_buff_head rel; /* Reliable packets queue */
struct sk_buff_head unrel; /* Unreliable packets queue */
unsigned long flags;
struct sk_buff *rx_skb; /* Receive buffer */
size_t rx_pending; /* Expecting more bytes */
bool rx_esc; /* SLIP escape mode */
u8 rx_ack; /* Last ack number received */
int (*rx_func) (struct hci_uart *hu, u8 c);
struct timer_list timer; /* Retransmission timer */
bool tx_ack_req; /* Pending ack to send */
u8 tx_seq; /* Next seq number to send */
u8 tx_ack; /* Next ack number to send */
u8 tx_win; /* Sliding window size */
@ -317,7 +323,7 @@ static void h5_complete_rx_pkt(struct hci_uart *hu)
if (H5_HDR_RELIABLE(hdr)) {
h5->tx_ack = (h5->tx_ack + 1) % 8;
h5->tx_ack_req = true;
set_bit(H5_TX_ACK_REQ, &h5->flags);
hci_uart_tx_wakeup(hu);
}
@ -445,12 +451,12 @@ static void h5_unslip_one_byte(struct h5 *h5, unsigned char c)
const u8 delim = SLIP_DELIMITER, esc = SLIP_ESC;
const u8 *byte = &c;
if (!h5->rx_esc && c == SLIP_ESC) {
h5->rx_esc = true;
if (!test_bit(H5_RX_ESC, &h5->flags) && c == SLIP_ESC) {
set_bit(H5_RX_ESC, &h5->flags);
return;
}
if (h5->rx_esc) {
if (test_and_clear_bit(H5_RX_ESC, &h5->flags)) {
switch (c) {
case SLIP_ESC_DELIM:
byte = &delim;
@ -463,8 +469,6 @@ static void h5_unslip_one_byte(struct h5 *h5, unsigned char c)
h5_reset_rx(h5);
return;
}
h5->rx_esc = false;
}
memcpy(skb_put(h5->rx_skb, 1), byte, 1);
@ -482,7 +486,7 @@ static void h5_reset_rx(struct h5 *h5)
h5->rx_func = h5_rx_delimiter;
h5->rx_pending = 0;
h5->rx_esc = false;
clear_bit(H5_RX_ESC, &h5->flags);
}
static int h5_recv(struct hci_uart *hu, void *data, int count)
@ -621,7 +625,7 @@ static struct sk_buff *h5_prepare_pkt(struct hci_uart *hu, u8 pkt_type,
h5_slip_delim(nskb);
hdr[0] = h5->tx_ack << 3;
h5->tx_ack_req = false;
clear_bit(H5_TX_ACK_REQ, &h5->flags);
/* Reliable packet? */
if (pkt_type == HCI_ACLDATA_PKT || pkt_type == HCI_COMMAND_PKT) {
@ -703,7 +707,7 @@ static struct sk_buff *h5_dequeue(struct hci_uart *hu)
unlock:
spin_unlock_irqrestore(&h5->unack.lock, flags);
if (h5->tx_ack_req)
if (test_bit(H5_TX_ACK_REQ, &h5->flags))
return h5_prepare_pkt(hu, HCI_3WIRE_ACK_PKT, NULL, 0);
return NULL;