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NFC: llcp: Fix zero octets length SDU handling 

LLCP Validation test #2 (Connection-less information transfer) send a
service data unit of zero octets length. This is now handled correctly.

Signed-off-by: Olivier Guiter <olivier.guiter@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Olivier Guiter 2013-03-25 11:24:21 +01:00 committed by Samuel Ortiz
parent 00e856db49
commit 0b23d666a8
1 changed files with 8 additions and 8 deletions
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16
net/nfc/llcp/commands.c
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@ -694,8 +694,7 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
remaining_len = len;
msg_ptr = msg_data;
while (remaining_len > 0) {
do {
frag_len = min_t(size_t, sock->remote_miu, remaining_len);
pr_debug("Fragment %zd bytes remaining %zd",
@ -708,7 +707,8 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
skb_put(pdu, LLCP_SEQUENCE_SIZE);
memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
if (likely(frag_len > 0))
memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
skb_queue_tail(&sock->tx_queue, pdu);
@ -720,7 +720,7 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
remaining_len -= frag_len;
msg_ptr += frag_len;
}
} while (remaining_len > 0);
kfree(msg_data);
@ -754,8 +754,7 @@ int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
remaining_len = len;
msg_ptr = msg_data;
while (remaining_len > 0) {
do {
frag_len = min_t(size_t, sock->remote_miu, remaining_len);
pr_debug("Fragment %zd bytes remaining %zd",
@ -770,14 +769,15 @@ int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
if (likely(frag_len > 0))
memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
/* No need to check for the peer RW for UI frames */
skb_queue_tail(&local->tx_queue, pdu);
remaining_len -= frag_len;
msg_ptr += frag_len;
}
} while (remaining_len > 0);
kfree(msg_data);