diff options
Diffstat (limited to 'net/nfc/nci/core.c')
| -rw-r--r-- | net/nfc/nci/core.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c index 6fd873aa86be..1dd0269c1a72 100644 --- a/net/nfc/nci/core.c +++ b/net/nfc/nci/core.c @@ -144,12 +144,15 @@ inline int nci_request(struct nci_dev *ndev, { int rc; - if (!test_bit(NCI_UP, &ndev->flags)) - return -ENETDOWN; - /* Serialize all requests */ mutex_lock(&ndev->req_lock); - rc = __nci_request(ndev, req, opt, timeout); + /* check the state after obtaing the lock against any races + * from nci_close_device when the device gets removed. + */ + if (test_bit(NCI_UP, &ndev->flags)) + rc = __nci_request(ndev, req, opt, timeout); + else + rc = -ENETDOWN; mutex_unlock(&ndev->req_lock); return rc; |