NFC: HCI check presence must not fail when driver doesn't support it
When the driver does not support checking the tag is still present, it
must return -EOPNOTSUPP. The NFC Core will then stop asking and not
report a tag lost event to user space.
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/net/nfc/core.c b/net/nfc/core.c
index 479bee3..4cb06976 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -697,6 +697,8 @@
if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) {
rc = dev->ops->check_presence(dev, dev->active_target);
+ if (rc == -EOPNOTSUPP)
+ goto exit;
if (!rc) {
mod_timer(&dev->check_pres_timer, jiffies +
msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
@@ -708,6 +710,7 @@
}
}
+exit:
device_unlock(&dev->dev);
}
