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NFC: st21nfca: fix st21nfca_get_iso14443_3_uid data copy 

st21nfca_get_iso14443_3_uid() does not correctly copy the uid from
uid_skb->data to its gate parameter. "gate = uid_skb->data;" only
puts a pointer to uid_skb->data to the local variable gate.
This means that in st21nfca_hci_target_from_gate() the content
of "u8 uid[NFC_NFCID1_MAXSIZE]" local variable is never initialized
before being used in memcpy(target->nfcid1, uid, len).

Fix this by replacing the local variable assignment with a memcpy.

This was found by compiling Linux with
"gcc -Wunused-but-set-parameter".

Acked-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Christophe Ricard 2015-03-31 08:02:16 +02:00 committed by Samuel Ortiz
parent d4a41d10b2
commit 9906a88df2
1 changed files with 1 additions and 1 deletions
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2
drivers/nfc/st21nfca/st21nfca.c
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@ -588,7 +588,7 @@ static int st21nfca_get_iso14443_3_uid(struct nfc_hci_dev *hdev, u8 *gate,
goto exit;
}
gate = uid_skb->data;
memcpy(gate, uid_skb->data, uid_skb->len);
*len = uid_skb->len;
exit:
kfree_skb(uid_skb);