From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
This patch adds tracking of received HCI events to the hci_dev struct.
This is necessary so that a subsequent patch can implement a function
for sending a single command synchronously and returning the resulting
command complete parameters in the function return value.
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 1 +
net/bluetooth/hci_core.c | 3 +++
net/bluetooth/hci_event.c | 12 ++++++++++++
3 files changed, 16 insertions(+)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 88dd46e..beae2e8 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -244,6 +244,7 @@ struct hci_dev {
struct sk_buff_head raw_q;
struct sk_buff_head cmd_q;
+ struct sk_buff *recv_evt;
struct sk_buff *sent_cmd;
struct sk_buff *reassembly[NUM_REASSEMBLY];
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9e07f2f..40249f6 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1123,6 +1123,9 @@ static int hci_dev_do_close(struct hci_dev *hdev)
hdev->sent_cmd = NULL;
}
+ kfree_skb(hdev->recv_evt);
+ hdev->recv_evt = NULL;
+
/* After this point our queues are empty
* and no tasks are scheduled. */
hdev->close(hdev);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 7e7fbca..ed0efb7 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3699,6 +3699,18 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
struct hci_event_hdr *hdr = (void *) skb->data;
__u8 event = hdr->evt;
+ hci_dev_lock(hdev);
+
+ /* Received events are (currently) only needed when a request is
+ * ongoing so avoid unnecessary memory allocation.
+ */
+ if (hdev->req_status == HCI_REQ_PEND) {
+ kfree_skb(hdev->recv_evt);
+ hdev->recv_evt = skb_clone(skb, GFP_KERNEL);
+ }
+
+ hci_dev_unlock(hdev);
+
skb_pull(skb, HCI_EVENT_HDR_SIZE);
switch (event) {
--
1.7.10.4
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