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NFC: Prevent polling when device is down

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Some devices turn radio on whenever they're asked to start a poll.
To prevent that from happening, we just don't call into the driver
start_poll hook when the NFC device is down.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz 2013-04-10 12:25:30 +02:00
parent 7c5a54fb86
commit 7757dc8a3e
1 changed files with 5 additions and 0 deletions
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5
net/nfc/core.c
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@ -143,6 +143,11 @@ int nfc_start_poll(struct nfc_dev *dev, u32 im_protocols, u32 tm_protocols)
goto error;
}
if (!dev->dev_up) {
rc = -ENODEV;
goto error;
}
if (dev->polling) {
rc = -EBUSY;
goto error;