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authorSamuel Ortiz <sameo@linux.intel.com>2013-04-10 12:25:30 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2013-04-11 16:29:10 +0200
commit7757dc8a3e7658abb6e5fc7d825a38b27961d0c8 (patch)
treebaf60c1117faa0c747d0330d9b9c15e031f18628 /net/nfc
parent7c5a54fb869d980c2a3c0972fe1e22816dd5b7b2 (diff)
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>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/core.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c
index 6ceee8e181ca..c571ca9a960c 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -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;

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