Commit 7757dc8a authored Apr 10, 2013 by Samuel Ortiz

NFC: Prevent polling when device is down



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>

parent 7c5a54fb

net/nfc/core.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;