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| author | Mark A. Greer <mgreer@animalcreek.com> | 2014-07-02 09:01:56 -0700 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2014-07-21 00:45:03 +0200 |
| commit | 4b4dbca5e49eea2567d0da777fea2c86e7b89622 (patch) | |
| tree | 87d4e7027d458f889b443eab85ad98cef8b8818e /net/nfc | |
| parent | 1d9e954e8b522ae37c7c0fdd791b5736321684a0 (diff) | |
| download | lwn-4b4dbca5e49eea2567d0da777fea2c86e7b89622.tar.gz lwn-4b4dbca5e49eea2567d0da777fea2c86e7b89622.zip | |
NFC: digital: Check for NFC-DEP before checking for Type 4 tag
In digital_in_recv_sel_res(), the code that determines
the tag type will interpret bits 7:6 (lsb being b1 as
per the Digital Specification) of a SEL RES set to 11b
as a Type 4 tag. This is okay except that the neard
will interpret the same value as an NFC-DEP device
(in src/tag.c:set_tag_type() in the neard source).
Make the digital layer's interpretation match neard's
interpretation by changing the order of the checks in
digital_in_recv_sel_res() so that a value of 11b in
bits 7:6 is interpreted as an NFC-DEP device instead
of a Type 4 tag.
Acked-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net/nfc')
| -rw-r--r-- | net/nfc/digital_technology.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/nfc/digital_technology.c b/net/nfc/digital_technology.c index c2c1c0189b7c..d1684cbfea68 100644 --- a/net/nfc/digital_technology.c +++ b/net/nfc/digital_technology.c @@ -318,6 +318,8 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg, if (DIGITAL_SEL_RES_IS_T2T(sel_res)) { nfc_proto = NFC_PROTO_MIFARE; + } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) { + nfc_proto = NFC_PROTO_NFC_DEP; } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) { rc = digital_in_send_rats(ddev, target); if (rc) @@ -327,8 +329,6 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg, * done when receiving the ATS */ goto exit_free_skb; - } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) { - nfc_proto = NFC_PROTO_NFC_DEP; } else { rc = -EOPNOTSUPP; goto exit; |