[PATCH 6.6 306/638] Bluetooth: hci_h5: Add ability to allocate memory for private data

Sasha Levin
2024-03-24T23:06:17Z

From: Andrey Skvortsov <andrej.skvortzov@gmail.com>

[ Upstream commit 7a6d793e9ca8bc0c1d2f0aa0a02ec380d1124c74 ]

In some cases uart-base drivers may need to use priv data. For
example, to store information needed for devcoredump.

Fixes: 044014ce85a1 ("Bluetooth: btrtl: Add Realtek devcoredump support")
Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/bluetooth/hci_h5.c | 4 +++-
drivers/bluetooth/hci_serdev.c | 9 +++++----
drivers/bluetooth/hci_uart.h | 12 +++++++++++-
3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index 71e748a9477e4..b66136348bd64 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -113,6 +113,7 @@ struct h5_vnd {
int (*suspend)(struct h5 *h5);
int (*resume)(struct h5 *h5);
const struct acpi_gpio_mapping *acpi_gpio_map;
+ int sizeof_priv;
};

struct h5_device_data {
@@ -863,7 +864,8 @@ static int h5_serdev_probe(struct serdev_device *serdev)
if (IS_ERR(h5->device_wake_gpio))
return PTR_ERR(h5->device_wake_gpio);

- return hci_uart_register_device(&h5->serdev_hu, &h5p);
+ return hci_uart_register_device_priv(&h5->serdev_hu, &h5p,
+ h5->vnd->sizeof_priv);
}

static void h5_serdev_remove(struct serdev_device *serdev)
diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c
index f16fd79bc02b8..611a11fbb2f3a 100644
--- a/drivers/bluetooth/hci_serdev.c
+++ b/drivers/bluetooth/hci_serdev.c
@@ -300,8 +300,9 @@ static const struct serdev_device_ops hci_serdev_client_ops = {
.write_wakeup = hci_uart_write_wakeup,
};

-int hci_uart_register_device(struct hci_uart *hu,
- const struct hci_uart_proto *p)
+int hci_uart_register_device_priv(struct hci_uart *hu,
+ const struct hci_uart_proto *p,
+ int sizeof_priv)
{
int err;
struct hci_dev *hdev;
@@ -325,7 +326,7 @@ int hci_uart_register_device(struct hci_uart *hu,
set_bit(HCI_UART_PROTO_READY, &hu->flags);

/* Initialize and register HCI device */
- hdev = hci_alloc_dev();
+ hdev = hci_alloc_dev_priv(sizeof_priv);
if (!hdev) {
BT_ERR("Can't allocate HCI device");
err = -ENOMEM;
@@ -394,7 +395,7 @@ int hci_uart_register_device(struct hci_uart *hu,
percpu_free_rwsem(&hu->proto_lock);
return err;
}
-EXPORT_SYMBOL_GPL(hci_uart_register_device);
+EXPORT_SYMBOL_GPL(hci_uart_register_device_priv);

void hci_uart_unregister_device(struct hci_uart *hu)
{
diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index fb4a2d0d8cc80..68c8c7e95d64d 100644
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -97,7 +97,17 @@ struct hci_uart {

int hci_uart_register_proto(const struct hci_uart_proto *p);
int hci_uart_unregister_proto(const struct hci_uart_proto *p);
-int hci_uart_register_device(struct hci_uart *hu, const struct hci_uart_proto *p);
+
+int hci_uart_register_device_priv(struct hci_uart *hu,
+ const struct hci_uart_proto *p,
+ int sizeof_priv);
+
+static inline int hci_uart_register_device(struct hci_uart *hu,
+ const struct hci_uart_proto *p)
+{
+ return hci_uart_register_device_priv(hu, p, 0);
+}
+
void hci_uart_unregister_device(struct hci_uart *hu);

int hci_uart_tx_wakeup(struct hci_uart *hu);
--
2.43.0