diff options
Diffstat (limited to 'net/nfc/digital_dep.c')
| -rw-r--r-- | net/nfc/digital_dep.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c index 6cf2eeb2e865..f864ce19e13d 100644 --- a/net/nfc/digital_dep.c +++ b/net/nfc/digital_dep.c @@ -65,6 +65,9 @@ #define DIGITAL_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & DIGITAL_NFC_DEP_PFB_DID_BIT) #define DIGITAL_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) +#define DIGITAL_NFC_DEP_RTOX_VALUE(data) ((data) & 0x3F) +#define DIGITAL_NFC_DEP_RTOX_MAX 59 + #define DIGITAL_NFC_DEP_PFB_I_PDU 0x00 #define DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU 0x40 #define DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 @@ -643,6 +646,11 @@ static int digital_in_send_rtox(struct nfc_digital_dev *ddev, struct digital_dep_req_res *dep_req; struct sk_buff *skb; int rc; + u16 rwt_int; + + rwt_int = ddev->dep_rwt * rtox; + if (rwt_int > digital_rwt_map[DIGITAL_NFC_DEP_IN_MAX_WT]) + rwt_int = digital_rwt_map[DIGITAL_NFC_DEP_IN_MAX_WT]; skb = digital_skb_alloc(ddev, 1); if (!skb) @@ -663,7 +671,7 @@ static int digital_in_send_rtox(struct nfc_digital_dev *ddev, ddev->skb_add_crc(skb); - rc = digital_in_send_cmd(ddev, skb, ddev->dep_rwt, + rc = digital_in_send_cmd(ddev, skb, rwt_int, digital_in_recv_dep_res, data_exch); if (rc) kfree_skb(skb); @@ -697,6 +705,7 @@ static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, u8 pfb; uint size; int rc; + u8 rtox; if (IS_ERR(resp)) { rc = PTR_ERR(resp); @@ -865,7 +874,20 @@ static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, goto free_resp; } - rc = digital_in_send_rtox(ddev, data_exch, resp->data[0]); + if (ddev->atn_count || ddev->nack_count) { + PROTOCOL_ERR("14.12.4.4"); + rc = -EIO; + goto error; + } + + rtox = DIGITAL_NFC_DEP_RTOX_VALUE(resp->data[0]); + if (!rtox || rtox > DIGITAL_NFC_DEP_RTOX_MAX) { + PROTOCOL_ERR("14.8.4.1"); + rc = -EIO; + goto error; + } + + rc = digital_in_send_rtox(ddev, data_exch, rtox); if (rc) goto error; |