We handle skb buffers all over the place, even though we have
hidp_send_*_message() helpers. This creates a more generic
hidp_send_message() helper and uses it instead of dealing with transmit
queues directly everywhere.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
---
net/bluetooth/hidp/core.c | 156 ++++++++++++++++++----------------------------
1 file changed, 60 insertions(+), 96 deletions(-)
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 531c18e..c7f5bb5 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -68,15 +68,6 @@ static void hidp_session_remove(struct hci_conn *conn,
static int hidp_session_thread(void *arg);
static void hidp_session_terminate(struct hidp_session *s);
-static inline void hidp_schedule(struct hidp_session *session)
-{
- struct sock *ctrl_sk = session->ctrl_sock->sk;
- struct sock *intr_sk = session->intr_sock->sk;
-
- wake_up_interruptible(sk_sleep(ctrl_sk));
- wake_up_interruptible(sk_sleep(intr_sk));
-}
-
static void hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci)
{
memset(ci, 0, sizeof(*ci));
@@ -107,11 +98,56 @@ static void hidp_copy_session(struct hidp_session *session, struct hidp_conninfo
}
}
+/* assemble skb, queue message on @transmit and wake up the session thread */
+static int hidp_send_message(struct hidp_session *session, struct socket *sock,
+ struct sk_buff_head *transmit, unsigned char hdr,
+ const unsigned char *data, int size)
+{
+ struct sk_buff *skb;
+ struct sock *sk = sock->sk;
+
+ BT_DBG("session %p data %p size %d", session, data, size);
+
+ if (atomic_read(&session->terminate))
+ return -EIO;
+
+ skb = alloc_skb(size + 1, GFP_ATOMIC);
+ if (!skb) {
+ BT_ERR("Can't allocate memory for new frame");
+ return -ENOMEM;
+ }
+
+ *skb_put(skb, 1) = hdr;
+ if (data && size > 0)
+ memcpy(skb_put(skb, size), data, size);
+
+ skb_queue_tail(transmit, skb);
+ wake_up_interruptible(sk_sleep(sk));
+
+ return 0;
+}
+
+static int hidp_send_ctrl_message(struct hidp_session *session,
+ unsigned char hdr, const unsigned char *data,
+ int size)
+{
+ return hidp_send_message(session, session->ctrl_sock,
+ &session->ctrl_transmit, hdr, data, size);
+}
+
+static int hidp_send_intr_message(struct hidp_session *session,
+ unsigned char hdr, const unsigned char *data,
+ int size)
+{
+ return hidp_send_message(session, session->intr_sock,
+ &session->intr_transmit, hdr, data, size);
+}
+
static int hidp_queue_event(struct hidp_session *session, struct input_dev *dev,
unsigned int type, unsigned int code, int value)
{
unsigned char newleds;
- struct sk_buff *skb;
+ unsigned char hdr, data[2];
BT_DBG("session %p type %d code %d value %d", session, type, code, value);
@@ -129,21 +165,11 @@ static int hidp_queue_event(struct hidp_session *session, struct input_dev *dev,
session->leds = newleds;
- skb = alloc_skb(3, GFP_ATOMIC);
- if (!skb) {
- BT_ERR("Can't allocate memory for new frame");
- return -ENOMEM;
- }
-
- *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
- *skb_put(skb, 1) = 0x01;
- *skb_put(skb, 1) = newleds;
-
- skb_queue_tail(&session->intr_transmit, skb);
+ hdr = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
+ data[0] = 0x01;
+ data[1] = newleds;
- hidp_schedule(session);
-
- return 0;
+ return hidp_send_intr_message(session, hdr, data, 2);
}
static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
@@ -216,71 +242,9 @@ static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb)
input_sync(dev);
}
-static int __hidp_send_ctrl_message(struct hidp_session *session,
- unsigned char hdr, unsigned char *data,
- int size)
-{
- struct sk_buff *skb;
-
- BT_DBG("session %p data %p size %d", session, data, size);
-
- if (atomic_read(&session->terminate))
- return -EIO;
-
- skb = alloc_skb(size + 1, GFP_ATOMIC);
- if (!skb) {
- BT_ERR("Can't allocate memory for new frame");
- return -ENOMEM;
- }
-
- *skb_put(skb, 1) = hdr;
- if (data && size > 0)
- memcpy(skb_put(skb, size), data, size);
-
- skb_queue_tail(&session->ctrl_transmit, skb);
-
- return 0;
-}
-
-static int hidp_send_ctrl_message(struct hidp_session *session,
- unsigned char hdr, unsigned char *data, int size)
-{
- int err;
-
- err = __hidp_send_ctrl_message(session, hdr, data, size);
-
- hidp_schedule(session);
-
- return err;
-}
-
-static int hidp_queue_report(struct hidp_session *session,
- unsigned char *data, int size)
-{
- struct sk_buff *skb;
-
- BT_DBG("session %p hid %p data %p size %d", session, session->hid, data, size);
-
- skb = alloc_skb(size + 1, GFP_ATOMIC);
- if (!skb) {
- BT_ERR("Can't allocate memory for new frame");
- return -ENOMEM;
- }
-
- *skb_put(skb, 1) = 0xa2;
- if (size > 0)
- memcpy(skb_put(skb, size), data, size);
-
- skb_queue_tail(&session->intr_transmit, skb);
-
- hidp_schedule(session);
-
- return 0;
-}
-
static int hidp_send_report(struct hidp_session *session, struct hid_report *report)
{
- unsigned char buf[32];
+ unsigned char buf[32], hdr;
int rsize;
rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0);
@@ -288,8 +252,9 @@ static int hidp_send_report(struct hidp_session *session, struct hid_report *rep
return -EIO;
hid_output_report(report, buf);
+ hdr = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
- return hidp_queue_report(session, buf, rsize);
+ return hidp_send_intr_message(session, hdr, buf, rsize);
}
static int hidp_get_raw_report(struct hid_device *hid,
@@ -325,7 +290,7 @@ static int hidp_get_raw_report(struct hid_device *hid,
session->waiting_report_number = numbered_reports ? report_number : -1;
set_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
data[0] = report_number;
- ret = hidp_send_ctrl_message(hid->driver_data, report_type, data, 1);
+ ret = hidp_send_ctrl_message(session, report_type, data, 1);
if (ret)
goto err;
@@ -385,7 +350,7 @@ static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, s
report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
break;
case HID_OUTPUT_REPORT:
- report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_OUPUT;
+ report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
break;
default:
return -EINVAL;
@@ -396,8 +361,7 @@ static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, s
/* Set up our wait, and send the report request to the device. */
set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
- ret = hidp_send_ctrl_message(hid->driver_data, report_type, data,
- count);
+ ret = hidp_send_ctrl_message(session, report_type, data, count);
if (ret)
goto err;
@@ -482,12 +446,12 @@ static void hidp_process_handshake(struct hidp_session *session,
case HIDP_HSHK_ERR_FATAL:
/* Device requests a reboot, as this is the only way this error
* can be recovered. */
- __hidp_send_ctrl_message(session,
+ hidp_send_ctrl_message(session,
HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0);
break;
default:
- __hidp_send_ctrl_message(session,
+ hidp_send_ctrl_message(session,
HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
break;
}
@@ -535,7 +499,7 @@ static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
break;
default:
- __hidp_send_ctrl_message(session,
+ hidp_send_ctrl_message(session,
HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
}
@@ -582,7 +546,7 @@ static void hidp_recv_ctrl_frame(struct hidp_session *session,
break;
default:
- __hidp_send_ctrl_message(session,
+ hidp_send_ctrl_message(session,
HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
break;
}
--
1.8.2
--
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