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| author | Eric Lapuyade <eric.lapuyade@intel.com> | 2012-05-03 16:21:58 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-07-09 16:42:09 -0400 |
| commit | 8668fdd6efb3a75e0d58a3287a47fa7e60a68a73 (patch) | |
| tree | 27b4846b8243014391833f62937e4a2c20718a18 /net/nfc/core.c | |
| parent | a070c8591a503ec65e2c84ebaf3454e5cd76e3fe (diff) | |
| download | linux-8668fdd6efb3a75e0d58a3287a47fa7e60a68a73.tar.gz linux-8668fdd6efb3a75e0d58a3287a47fa7e60a68a73.tar.bz2 linux-8668fdd6efb3a75e0d58a3287a47fa7e60a68a73.zip | |
NFC: Core must test the device polling state inside the device lock
There can ever be only one call to nfc_targets_found() after polling
has been engaged. This could be from a target discovered event from
the driver, or from an error handler to notify poll will never complete.
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net/nfc/core.c')
| -rw-r--r-- | net/nfc/core.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c index 32f28326b623..94ccf07374a5 100644 --- a/net/nfc/core.c +++ b/net/nfc/core.c @@ -571,13 +571,18 @@ int nfc_targets_found(struct nfc_dev *dev, pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets); - dev->polling = false; - for (i = 0; i < n_targets; i++) targets[i].idx = dev->target_next_idx++; device_lock(&dev->dev); + if (dev->polling == false) { + device_unlock(&dev->dev); + return 0; + } + + dev->polling = false; + dev->targets_generation++; kfree(dev->targets); |