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NFC: digital: Set current target active on activate_target() call 

The curr_protocol field of nfc_digital_dev structure used to determine
if a target is currently active was set too soon, immediately when a
target is found. This is not good since there is no other way than
deactivate_target() to reset curr_protocol and if activate_target() is
not called, the target remains active and it's not possible to put the
device in poll mode anymore.

With this patch curr_protocol is set when nfc core activates a target,
puts a device up, or when an ATR_REQ is received in target mode.

Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Thierry Escande 2014-01-06 23:34:37 +01:00 committed by Samuel Ortiz
parent 15203b4c79
commit 48e1044515
2 changed files with 28 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
net/nfc/digital_core.c
View File

@ -339,7 +339,6 @@ int digital_target_found(struct nfc_digital_dev *ddev,
pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol);
ddev->curr_rf_tech = rf_tech;
ddev->curr_protocol = protocol;
if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
ddev->skb_add_crc = digital_skb_add_crc_none;
@ -541,8 +540,14 @@ static int digital_dep_link_up(struct nfc_dev *nfc_dev,
__u8 comm_mode, __u8 *gb, size_t gb_len)
{
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
int rc;
return digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len);
rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len);
if (!rc)
ddev->curr_protocol = NFC_PROTO_NFC_DEP;
return rc;
}
static int digital_dep_link_down(struct nfc_dev *nfc_dev)
@ -557,6 +562,20 @@ static int digital_dep_link_down(struct nfc_dev *nfc_dev)
static int digital_activate_target(struct nfc_dev *nfc_dev,
struct nfc_target *target, __u32 protocol)
{
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
if (ddev->poll_tech_count) {
pr_err("Can't activate a target while polling\n");
return -EBUSY;
}
if (ddev->curr_protocol) {
pr_err("A target is already active\n");
return -EBUSY;
}
ddev->curr_protocol = protocol;
return 0;
}
@ -565,6 +584,11 @@ static void digital_deactivate_target(struct nfc_dev *nfc_dev,
{
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
if (!ddev->curr_protocol) {
pr_err("No active target\n");
return;
}
ddev->curr_protocol = 0;
}

2
net/nfc/digital_dep.c
View File

@ -681,6 +681,8 @@ void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg,
ddev->skb_check_crc = digital_skb_check_crc_none;
}
ddev->curr_protocol = NFC_PROTO_NFC_DEP_MASK;
rc = ddev->skb_check_crc(resp);
if (rc) {
PROTOCOL_ERR("14.4.1.6");