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authorJohan Hedberg <johan.hedberg@intel.com>2012-07-16 17:12:19 +0400
committerGustavo Padovan <gustavo.padovan@collabora.co.uk>2012-07-17 21:49:24 +0400
commite0482103c22957b413db4c4ba35eca3b1e99751d (patch)
treeb94980ec5c9abcbdddfe09d187a935528da65991 /drivers/bluetooth
parentafdc944c1b9604fd0399d490e5bec5e632f731d0 (diff)
downloadlinux-e0482103c22957b413db4c4ba35eca3b1e99751d.tar.xz
Bluetooth: Introduce a flags variable to Three-wire UART state
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>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/hci_h5.c26
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index 831ccfecc8a9..b6154d5a07a5 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -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;