NFC: Reserve tx head and tail room
We can have the NFC core layer allocating the tx head and tail
room for the drivers and avoid 1 or more SKBs copy on write on
the Tx path.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/nfc/core.c b/net/nfc/core.c
index b6fd4e1..284e2f6 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -322,7 +322,9 @@
* @supported_protocols: NFC protocols supported by the device
*/
struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
- u32 supported_protocols)
+ u32 supported_protocols,
+ int tx_headroom,
+ int tx_tailroom)
{
static atomic_t dev_no = ATOMIC_INIT(0);
struct nfc_dev *dev;
@@ -345,6 +347,8 @@
dev->ops = ops;
dev->supported_protocols = supported_protocols;
+ dev->tx_headroom = tx_headroom;
+ dev->tx_tailroom = tx_tailroom;
spin_lock_init(&dev->targets_lock);
nfc_genl_data_init(&dev->genl_data);
