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NFC: nci: Add status byte management in case of error.

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The nci status byte was ignored. In case of tag reading for example,
if the tag is removed from the antenna there is no way for the upper
layers (aka: stack) to get inform about such event.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Christophe Ricard 2014-12-02 21:27:47 +01:00 committed by Samuel Ortiz
parent aceb32d05a
commit 98ff416f97
1 changed files with 9 additions and 2 deletions
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11
net/nfc/nci/data.c
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@ -185,11 +185,16 @@ int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb)
static void nci_add_rx_data_frag(struct nci_dev *ndev,
struct sk_buff *skb,
__u8 pbf)
__u8 pbf, __u8 status)
{
int reassembly_len;
int err = 0;
if (status) {
err = status;
goto exit;
}
if (ndev->rx_data_reassembly) {
reassembly_len = ndev->rx_data_reassembly->len;
@ -241,6 +246,7 @@ static void nci_add_rx_data_frag(struct nci_dev *ndev,
void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb)
{
__u8 pbf = nci_pbf(skb->data);
__u8 status = 0;
pr_debug("len %d\n", skb->len);
@ -258,8 +264,9 @@ void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb)
ndev->target_active_prot == NFC_PROTO_ISO15693) {
/* frame I/F => remove the status byte */
pr_debug("frame I/F => remove the status byte\n");
status = skb->data[skb->len - 1];
skb_trim(skb, (skb->len - 1));
}
nci_add_rx_data_frag(ndev, skb, pbf);
nci_add_rx_data_frag(ndev, skb, pbf, nci_to_errno(status));
}