NFC: Remove the rf mode parameter from the DEP link up routine

When calling nfc_dep_link_up, we implicitely are in initiator mode.
Which means we also can provide the general bytes as a function argument,
as all drivers will eventually request them.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 17 insertions, 23 deletions

diff --git a/net/nfc/core.c b/net/nfc/core.c
index 6089aca67b1..f4f526f7321 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -181,13 +181,13 @@ error:
 	return rc;
 }
 
-int nfc_dep_link_up(struct nfc_dev *dev, int target_index,
-					u8 comm_mode, u8 rf_mode)
+int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode)
 {
 	int rc = 0;
+	u8 *gb;
+	size_t gb_len;
 
-	pr_debug("dev_name=%s comm:%d rf:%d\n",
-			dev_name(&dev->dev), comm_mode, rf_mode);
+	pr_debug("dev_name=%s comm %d\n", dev_name(&dev->dev), comm_mode);
 
 	if (!dev->ops->dep_link_up)
 		return -EOPNOTSUPP;
@@ -204,7 +204,13 @@ int nfc_dep_link_up(struct nfc_dev *dev, int target_index,
 		goto error;
 	}
 
-	rc = dev->ops->dep_link_up(dev, target_index, comm_mode, rf_mode);
+	gb = nfc_llcp_general_bytes(dev, &gb_len);
+	if (gb_len > NFC_MAX_GT_LEN) {
+		rc = -EINVAL;
+		goto error;
+	}
+
+	rc = dev->ops->dep_link_up(dev, target_index, comm_mode, gb, gb_len);
 
 error:
 	device_unlock(&dev->dev);
@@ -367,12 +373,6 @@ int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len)
 }
 EXPORT_SYMBOL(nfc_set_remote_general_bytes);
 
-u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, u8 *gt_len)
-{
-	return nfc_llcp_general_bytes(dev, gt_len);
-}
-EXPORT_SYMBOL(nfc_get_local_general_bytes);
-
 /**
  * nfc_alloc_send_skb - allocate a skb for data exchange responses
  *
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index a0cb133c610..3ce646e35f6 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -281,7 +281,7 @@ void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap)
 	mutex_unlock(&local->sdp_lock);
 }
 
-u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, u8 *general_bytes_len)
+u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len)
 {
 	struct nfc_llcp_local *local;
 
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index a1388e4efd6..fa620d03799 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -542,13 +542,12 @@ static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
 	struct nfc_dev *dev;
 	int rc, tgt_idx;
 	u32 idx;
-	u8 comm, rf;
+	u8 comm;
 
 	pr_debug("DEP link up\n");
 
 	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
-			!info->attrs[NFC_ATTR_COMM_MODE] ||
-			!info->attrs[NFC_ATTR_RF_MODE])
+	    !info->attrs[NFC_ATTR_COMM_MODE])
 		return -EINVAL;
 
 	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
@@ -558,19 +557,15 @@ static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
 		tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
 
 	comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
-	rf = nla_get_u8(info->attrs[NFC_ATTR_RF_MODE]);
 
 	if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
 		return -EINVAL;
 
-	if (rf != NFC_RF_INITIATOR && comm != NFC_RF_TARGET)
-		return -EINVAL;
-
 	dev = nfc_get_device(idx);
 	if (!dev)
 		return -ENODEV;
 
-	rc = nfc_dep_link_up(dev, tgt_idx, comm, rf);
+	rc = nfc_dep_link_up(dev, tgt_idx, comm);
 
 	nfc_put_device(dev);
 
diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h
index 6d28d75995b..2fd83b16df6 100644
--- a/net/nfc/nfc.h
+++ b/net/nfc/nfc.h
@@ -54,7 +54,7 @@ void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
 int nfc_llcp_register_device(struct nfc_dev *dev);
 void nfc_llcp_unregister_device(struct nfc_dev *dev);
 int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len);
-u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, u8 *general_bytes_len);
+u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len);
 int __init nfc_llcp_init(void);
 void nfc_llcp_exit(void);
 
@@ -160,8 +160,7 @@ int nfc_start_poll(struct nfc_dev *dev, u32 protocols);
 
 int nfc_stop_poll(struct nfc_dev *dev);
 
-int nfc_dep_link_up(struct nfc_dev *dev, int target_idx,
-				u8 comm_mode, u8 rf_mode);
+int nfc_dep_link_up(struct nfc_dev *dev, int target_idx, u8 comm_mode);
 
 int nfc_dep_link_down(struct nfc_dev *dev);