In the same way as a intel_data (hu) needs to access its corresponding
intel_device (pdev). A intel_device may be required to access the
intel_data. We need to maintain a list of current intel_data and
protect it against concurrent access.
Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxx>
---
drivers/bluetooth/hci_intel.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c
index f855515..99f1307 100644
--- a/drivers/bluetooth/hci_intel.c
+++ b/drivers/bluetooth/hci_intel.c
@@ -75,11 +75,16 @@ static LIST_HEAD(intel_device_list);
static DEFINE_SPINLOCK(intel_device_list_lock);
struct intel_data {
+ struct list_head list;
struct sk_buff *rx_skb;
struct sk_buff_head txq;
unsigned long flags;
+ struct hci_uart *hu;
};
+static LIST_HEAD(intel_data_list);
+static DEFINE_MUTEX(intel_data_list_lock);
+
static u8 intel_convert_speed(unsigned int speed)
{
switch (speed) {
@@ -130,6 +135,24 @@ static struct intel_device *intel_device_get(struct hci_uart *hu)
return NULL;
}
+static struct intel_data *intel_data_get(struct intel_device *idev)
+{
+ struct list_head *p;
+
+ list_for_each(p, &intel_data_list) {
+ struct intel_data *intel = list_entry(p, struct intel_data,
+ list);
+
+ /* tty device and pdev device should share the same parent
+ * which is the UART port.
+ */
+ if (intel->hu->tty->dev->parent == idev->pdev->dev.parent)
+ return intel;
+ }
+
+ return NULL;
+}
+
static int intel_wait_booting(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
@@ -194,6 +217,11 @@ static int intel_open(struct hci_uart *hu)
skb_queue_head_init(&intel->txq);
hu->priv = intel;
+ intel->hu = hu;
+
+ mutex_lock(&intel_data_list_lock);
+ list_add_tail(&intel->list, &intel_data_list);
+ mutex_unlock(&intel_data_list_lock);
if (!intel_set_power(hu, true))
set_bit(STATE_BOOTING, &intel->flags);
@@ -209,6 +237,10 @@ static int intel_close(struct hci_uart *hu)
intel_set_power(hu, false);
+ mutex_lock(&intel_data_list_lock);
+ list_del(&intel->list);
+ mutex_unlock(&intel_data_list_lock);
+
skb_queue_purge(&intel->txq);
kfree_skb(intel->rx_skb);
kfree(intel);
--
1.9.1
--
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