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NFC: port100: Don't send a new command if one is still pending

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This patch ensures that a command is not still in process before sending
a new one to the device. This can happen when neard is in constant
polling mode: the configure_hw command can be sent when neard restarts
polling after a LLCP SYMM timeout but before the device has returned in
timeout from the last DEP frame sent.

Signed-off-by: Thierry Escande <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
This commit is contained in:
Thierry Escande 2016-06-16 20:25:20 +02:00 • committed by Samuel Ortiz
commit e3e0258839
1 changed files with 6 additions and 0 deletions
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6
drivers/nfc/port100.c
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@ -809,6 +809,12 @@ static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
PORT100_FRAME_MAX_PAYLOAD_LEN +
PORT100_FRAME_TAIL_LEN;
if (dev->cmd) {
nfc_err(&dev->interface->dev,
"A command is still in process\n");
return -EBUSY;
}
resp = alloc_skb(resp_len, GFP_KERNEL);
if (!resp)
return -ENOMEM;