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Commit e1da0efa authored by Eric Lapuyade's avatar Eric Lapuyade Committed by John W. Linville
Browse files

NFC: Export target lost function 



NFC drivers will call this routine when they detect that a tag leaves the
RF field. This will eventually lead to the corresponding netlink event
to be sent.

Signed-off-by: default avatarEric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 8112a5c9

include/net/nfc/nfc.h

+1 −0
Original line number Diff line number Diff line
@@ -181,6 +181,7 @@ int nfc_set_remote_general_bytes(struct nfc_dev *dev, 


int nfc_targets_found(struct nfc_dev *dev,

		      struct nfc_target *targets, int ntargets);

int nfc_target_lost(struct nfc_dev *dev, u32 target_idx);



int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,

		       u8 comm_mode, u8 rf_mode);

net/nfc/core.c

+39 −0
Original line number Diff line number Diff line
@@ -455,6 +455,45 @@ int nfc_targets_found(struct nfc_dev *dev, 
}

EXPORT_SYMBOL(nfc_targets_found);



int nfc_target_lost(struct nfc_dev *dev, u32 target_idx)

{

	struct nfc_target *tg;

	int i;



	pr_debug("dev_name %s n_target %d\n", dev_name(&dev->dev), target_idx);



	spin_lock_bh(&dev->targets_lock);



	for (i = 0; i < dev->n_targets; i++) {

		tg = &dev->targets[i];

		if (tg->idx == target_idx)

			break;

	}



	if (i == dev->n_targets) {

		spin_unlock_bh(&dev->targets_lock);

		return -EINVAL;

	}



	dev->targets_generation++;

	dev->n_targets--;



	if (dev->n_targets) {

		memcpy(&dev->targets[i], &dev->targets[i + 1],

		       (dev->n_targets - i) * sizeof(struct nfc_target));

	} else {

		kfree(dev->targets);

		dev->targets = NULL;

	}



	spin_unlock_bh(&dev->targets_lock);



	nfc_genl_target_lost(dev, target_idx);



	return 0;

}

EXPORT_SYMBOL(nfc_target_lost);



static void nfc_release(struct device *d)

{

	struct nfc_dev *dev = to_nfc_dev(d);