From 6ce306682f7f07a5e9e51c655764ead214ef3869 Mon Sep 17 00:00:00 2001 From: "Mark A. Greer" Date: Tue, 23 Sep 2014 16:38:03 -0700 Subject: [PATCH] NFC: digital: Rearrange NFC-DEP DEP_REQ/DEP_RES Code Rearrange some of the code in digital_in_recv_dep_res() and digital_tg_recv_dep_req() so the initial code looks similar. The real reason is prepare the code for some upcoming patches that require these changes. Reviewed-by: Thierry Escande Tested-by: Thierry Escande Signed-off-by: Mark A. Greer Signed-off-by: Samuel Ortiz --- net/nfc/digital_dep.c | 43 ++++++++++++++++++++++--------------------- 1 file changed, 22 insertions(+), 21 deletions(-) diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c index 70fcce03e8a9..f3f2b61fb5da 100644 --- a/net/nfc/digital_dep.c +++ b/net/nfc/digital_dep.c @@ -400,10 +400,10 @@ static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, goto exit; } + size = sizeof(struct digital_dep_req_res); dep_res = (struct digital_dep_req_res *)resp->data; - if (resp->len < sizeof(struct digital_dep_req_res) || - dep_res->dir != DIGITAL_NFC_DEP_FRAME_DIR_IN || + if (resp->len < size || dep_res->dir != DIGITAL_NFC_DEP_FRAME_DIR_IN || dep_res->cmd != DIGITAL_CMD_DEP_RES) { rc = -EIO; goto error; @@ -411,6 +411,16 @@ static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, pfb = dep_res->pfb; + if (DIGITAL_NFC_DEP_DID_BIT_SET(pfb)) + size++; + + if (size > resp->len) { + rc = -EIO; + goto error; + } + + skb_pull(resp, size); + switch (DIGITAL_NFC_DEP_PFB_TYPE(pfb)) { case DIGITAL_NFC_DEP_PFB_I_PDU: if (DIGITAL_NFC_DEP_PFB_PNI(pfb) != ddev->curr_nfc_dep_pni) { @@ -435,7 +445,7 @@ static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, goto error; } - rc = digital_in_send_rtox(ddev, data_exch, resp->data[3]); + rc = digital_in_send_rtox(ddev, data_exch, resp->data[0]); if (rc) goto error; @@ -449,18 +459,6 @@ static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, goto error; } - size = sizeof(struct digital_dep_req_res); - - if (DIGITAL_NFC_DEP_DID_BIT_SET(pfb)) - size++; - - if (size > resp->len) { - rc = -EIO; - goto error; - } - - skb_pull(resp, size); - exit: data_exch->cb(data_exch->cb_context, resp, rc); @@ -524,6 +522,7 @@ static void digital_tg_recv_dep_req(struct nfc_digital_dev *ddev, void *arg, { int rc; struct digital_dep_req_res *dep_req; + u8 pfb; size_t size; if (IS_ERR(resp)) { @@ -553,18 +552,22 @@ static void digital_tg_recv_dep_req(struct nfc_digital_dev *ddev, void *arg, goto exit; } - if (DIGITAL_NFC_DEP_DID_BIT_SET(dep_req->pfb)) + pfb = dep_req->pfb; + + if (DIGITAL_NFC_DEP_DID_BIT_SET(pfb)) size++; - if (resp->len < size) { + if (size > resp->len) { rc = -EIO; goto exit; } - switch (DIGITAL_NFC_DEP_PFB_TYPE(dep_req->pfb)) { + skb_pull(resp, size); + + switch (DIGITAL_NFC_DEP_PFB_TYPE(pfb)) { case DIGITAL_NFC_DEP_PFB_I_PDU: pr_debug("DIGITAL_NFC_DEP_PFB_I_PDU\n"); - ddev->curr_nfc_dep_pni = DIGITAL_NFC_DEP_PFB_PNI(dep_req->pfb); + ddev->curr_nfc_dep_pni = DIGITAL_NFC_DEP_PFB_PNI(pfb); break; case DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU: pr_err("Received a ACK/NACK PDU\n"); @@ -576,8 +579,6 @@ static void digital_tg_recv_dep_req(struct nfc_digital_dev *ddev, void *arg, goto exit; } - skb_pull(resp, size); - rc = nfc_tm_data_received(ddev->nfc_dev, resp); exit: