NFC: Cache the core NFC active target pointer instead of its index

The NFC Core now caches the active nfc target pointer, thereby avoiding
the need to lookup the target table for each invocation of a driver ops.
Consequently, pn533, HCI and NCI now directly receive an nfc_target
pointer instead of a target index.

Cc: Ilan Elias <ilane@ti.com>
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 10 insertions, 8 deletions

diff --git a/include/net/nfc/nfc.h b/include/net/nfc/nfc.h
index 9a2505a5b8de..0fcf4a54776b 100644
--- a/include/net/nfc/nfc.h
+++ b/include/net/nfc/nfc.h
@@ -48,26 +48,28 @@ struct nfc_dev;
 typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb,
                                                                 int err);
 
+struct nfc_target;
+
 struct nfc_ops {
         int (*dev_up)(struct nfc_dev *dev);
         int (*dev_down)(struct nfc_dev *dev);
         int (*start_poll)(struct nfc_dev *dev, u32 protocols);
         void (*stop_poll)(struct nfc_dev *dev);
-        int (*dep_link_up)(struct nfc_dev *dev, int target_idx, u8 comm_mode,
-                           u8 *gb, size_t gb_len);
+        int (*dep_link_up)(struct nfc_dev *dev, struct nfc_target *target,
+                           u8 comm_mode, u8 *gb, size_t gb_len);
         int (*dep_link_down)(struct nfc_dev *dev);
-        int (*activate_target)(struct nfc_dev *dev, u32 target_idx,
+        int (*activate_target)(struct nfc_dev *dev, struct nfc_target *target,
                                u32 protocol);
-        void (*deactivate_target)(struct nfc_dev *dev, u32 target_idx);
-        int (*data_exchange)(struct nfc_dev *dev, u32 target_idx,
+        void (*deactivate_target)(struct nfc_dev *dev,
+                                  struct nfc_target *target);
+        int (*data_exchange)(struct nfc_dev *dev, struct nfc_target *target,
                              struct sk_buff *skb, data_exchange_cb_t cb,
                              void *cb_context);
-        int (*check_presence)(struct nfc_dev *dev, u32 target_idx);
+        int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target);
 };
 
 #define NFC_TARGET_IDX_ANY -1
 #define NFC_MAX_GT_LEN 48
-#define NFC_TARGET_IDX_NONE 0xffffffff
 
 struct nfc_target {
         u32 idx;
@@ -99,7 +101,7 @@ struct nfc_dev {
         struct device dev;
         bool dev_up;
         bool polling;
-        u32 activated_target_idx;
+        struct nfc_target *active_target;
         bool dep_link_up;
         u32 dep_rf_mode;
         struct nfc_genl_data genl_data;