NFC: Clearly separate NCI states from flags

Make a clear separation between NCI states and flags.
This is required in order to support more NCI states (e.g.
for multiple targets support).

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 815d28a0ed9d..629b76845973 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -264,6 +264,7 @@ static int nci_open_device(struct nci_dev *ndev)
 
         if (!rc) {
                 set_bit(NCI_UP, &ndev->flags);
+                atomic_set(&ndev->state, NCI_IDLE);
         } else {
                 /* Init failed, cleanup */
                 skb_queue_purge(&ndev->cmd_q);
@@ -360,7 +361,7 @@ static int nci_start_poll(struct nfc_dev *nfc_dev, __u32 protocols)
         struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
         int rc;
 
-        if (test_bit(NCI_DISCOVERY, &ndev->flags)) {
+        if (atomic_read(&ndev->state) == NCI_DISCOVERY) {
                 pr_err("unable to start poll, since poll is already active\n");
                 return -EBUSY;
         }
@@ -370,7 +371,7 @@ static int nci_start_poll(struct nfc_dev *nfc_dev, __u32 protocols)
                 return -EBUSY;
         }
 
-        if (test_bit(NCI_POLL_ACTIVE, &ndev->flags)) {
+        if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
                 pr_debug("target is active, implicitly deactivate...\n");
 
                 rc = nci_request(ndev, nci_rf_deactivate_req, 0,
@@ -392,7 +393,7 @@ static void nci_stop_poll(struct nfc_dev *nfc_dev)
 {
         struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
 
-        if (!test_bit(NCI_DISCOVERY, &ndev->flags)) {
+        if (atomic_read(&ndev->state) != NCI_DISCOVERY) {
                 pr_err("unable to stop poll, since poll is not active\n");
                 return;
         }
@@ -408,7 +409,7 @@ static int nci_activate_target(struct nfc_dev *nfc_dev, __u32 target_idx,
 
         pr_debug("target_idx %d, protocol 0x%x\n", target_idx, protocol);
 
-        if (!test_bit(NCI_POLL_ACTIVE, &ndev->flags)) {
+        if (atomic_read(&ndev->state) != NCI_POLL_ACTIVE) {
                 pr_err("there is no available target to activate\n");
                 return -EINVAL;
         }
@@ -443,7 +444,7 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev, __u32 target_idx)
 
         ndev->target_active_prot = 0;
 
-        if (test_bit(NCI_POLL_ACTIVE, &ndev->flags)) {
+        if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
                 nci_request(ndev, nci_rf_deactivate_req, 0,
                         msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
         }