NFC: pn533: Add MI/TG bits only when in Initiator mode

The fragmentation routine (used to split big frames) could be used in
target or initiator mode (TgSetMetaData vs InDataExchange), but the
MI/TG bytes are not needed in target mode (TgSetMetaData), so we
add a check on the mode

Signed-off-by: Olivier Guiter <olivier.guiter@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 11 insertions, 8 deletions

diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index 75bffd8bb3eb..0b7e928ceb3d 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -2504,14 +2504,17 @@ static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
                         break;
                 }
 
-                /* Reserve the TG/MI byte */
-                skb_reserve(frag, 1);
-
-                /* MI + TG */
-                if (frag_size  == PN533_CMD_DATAFRAME_MAXLEN)
-                        *skb_push(frag, sizeof(u8)) = (PN533_CMD_MI_MASK | 1);
-                else
-                        *skb_push(frag, sizeof(u8)) =  1; /* TG */
+                if (!dev->tgt_mode) {
+                        /* Reserve the TG/MI byte */
+                        skb_reserve(frag, 1);
+
+                        /* MI + TG */
+                        if (frag_size  == PN533_CMD_DATAFRAME_MAXLEN)
+                                *skb_push(frag, sizeof(u8)) =
+                                                        (PN533_CMD_MI_MASK | 1);
+                        else
+                                *skb_push(frag, sizeof(u8)) =  1; /* TG */
+                }
 
                 memcpy(skb_put(frag, frag_size), skb->data, frag_size);