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| author | Samuel Ortiz <sameo@linux.intel.com> | 2013-04-10 12:25:30 +0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-04-11 16:29:10 +0200 |
| commit | 7757dc8a3e7658abb6e5fc7d825a38b27961d0c8 (patch) | |
| tree | baf60c1117faa0c747d0330d9b9c15e031f18628 /net/nfc | |
| parent | 7c5a54fb869d980c2a3c0972fe1e22816dd5b7b2 (diff) | |
| download | linux-stable-7757dc8a3e7658abb6e5fc7d825a38b27961d0c8.tar.gz linux-stable-7757dc8a3e7658abb6e5fc7d825a38b27961d0c8.tar.bz2 linux-stable-7757dc8a3e7658abb6e5fc7d825a38b27961d0c8.zip | |
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.c | 5 |
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; |