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NFC: fdp: Fix a signedness bug in fdp_nci_send_patch()

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[ Upstream commit 0dcdf9f64028ec3b75db6b691560f8286f3898bf ]

The nci_conn_max_data_pkt_payload_size() function sometimes returns
-EPROTO so "max_size" needs to be signed for the error handling to
work.  We can make "payload_size" an int as well.

Fixes: a06347c04c ("NFC: Add Intel Fields Peak NFC solution driver")
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Dan Carpenter 2020-03-20 16:21:17 +03:00 • committed by Greg Kroah-Hartman
commit 3428faf70c
1 changed files with 2 additions and 3 deletions
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5
drivers/nfc/fdp/fdp.c
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@ -184,7 +184,7 @@ static int fdp_nci_send_patch(struct nci_dev *ndev, u8 conn_id, u8 type)
const struct firmware *fw;
struct sk_buff *skb;
unsigned long len;
u8 max_size, payload_size;
int max_size, payload_size;
int rc = 0;
if ((type == NCI_PATCH_TYPE_OTP && !info->otp_patch) ||
@ -207,8 +207,7 @@ static int fdp_nci_send_patch(struct nci_dev *ndev, u8 conn_id, u8 type)
while (len) {
payload_size = min_t(unsigned long, (unsigned long) max_size,
len);
payload_size = min_t(unsigned long, max_size, len);
skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + payload_size),
GFP_KERNEL);