rfkill: remove user_claim stuff
Almost all drivers do not support user_claim, so remove it
completely and always report -EOPNOTSUPP to userspace. Since
userspace cannot really drive rfkill _anyway_ (due to the
odd restrictions imposed by the documentation) having this
code is just pointless.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/Documentation/rfkill.txt b/Documentation/rfkill.txt
index 4d3ee31..40c3a3f 100644
--- a/Documentation/rfkill.txt
+++ b/Documentation/rfkill.txt
@@ -521,16 +521,12 @@
Input devices may issue events that are related to rfkill. These are the
various KEY_* events and SW_* events supported by rfkill-input.c.
-******IMPORTANT******
-When rfkill-input is ACTIVE, userspace is NOT TO CHANGE THE STATE OF AN RFKILL
-SWITCH IN RESPONSE TO AN INPUT EVENT also handled by rfkill-input, unless it
-has set to true the user_claim attribute for that particular switch. This rule
-is *absolute*; do NOT violate it.
-******IMPORTANT******
+Userspace may not change the state of an rfkill switch in response to an
+input event, it should refrain from changing states entirely.
-Userspace must not assume it is the only source of control for rfkill switches.
-Their state CAN and WILL change due to firmware actions, direct user actions,
-and the rfkill-input EPO override for *_RFKILL_ALL.
+Userspace cannot assume it is the only source of control for rfkill switches.
+Their state can change due to firmware actions, direct user actions, and the
+rfkill-input EPO override for *_RFKILL_ALL.
When rfkill-input is not active, userspace must initiate a rfkill status
change by writing to the "state" attribute in order for anything to happen.
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 13d4e67..0607df2 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1267,7 +1267,6 @@
sc->rf_kill.rfkill->data = sc;
sc->rf_kill.rfkill->toggle_radio = ath_sw_toggle_radio;
sc->rf_kill.rfkill->state = RFKILL_STATE_UNBLOCKED;
- sc->rf_kill.rfkill->user_claim_unsupported = 1;
return 0;
}
diff --git a/drivers/net/wireless/b43/rfkill.c b/drivers/net/wireless/b43/rfkill.c
index afad423..9e1d00b 100644
--- a/drivers/net/wireless/b43/rfkill.c
+++ b/drivers/net/wireless/b43/rfkill.c
@@ -139,7 +139,6 @@
rfk->rfkill->state = RFKILL_STATE_UNBLOCKED;
rfk->rfkill->data = dev;
rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle;
- rfk->rfkill->user_claim_unsupported = 1;
rfk->poll_dev = input_allocate_polled_device();
if (!rfk->poll_dev) {
diff --git a/drivers/net/wireless/b43legacy/rfkill.c b/drivers/net/wireless/b43legacy/rfkill.c
index b32bf6a..4b0c7d2 100644
--- a/drivers/net/wireless/b43legacy/rfkill.c
+++ b/drivers/net/wireless/b43legacy/rfkill.c
@@ -142,7 +142,6 @@
rfk->rfkill->state = RFKILL_STATE_UNBLOCKED;
rfk->rfkill->data = dev;
rfk->rfkill->toggle_radio = b43legacy_rfkill_soft_toggle;
- rfk->rfkill->user_claim_unsupported = 1;
rfk->poll_dev = input_allocate_polled_device();
if (!rfk->poll_dev) {
diff --git a/drivers/net/wireless/iwlwifi/iwl-rfkill.c b/drivers/net/wireless/iwlwifi/iwl-rfkill.c
index 2ad9faf..65605ad 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rfkill.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rfkill.c
@@ -91,7 +91,6 @@
priv->rfkill->data = priv;
priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
priv->rfkill->toggle_radio = iwl_rfkill_soft_rf_kill;
- priv->rfkill->user_claim_unsupported = 1;
priv->rfkill->dev.class->suspend = NULL;
priv->rfkill->dev.class->resume = NULL;
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 0f6e43b..62d02b3 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -1005,7 +1005,6 @@
*data = cap;
rfkill_dev->data = data;
rfkill_dev->toggle_radio = acer_rfkill_set;
- rfkill_dev->user_claim_unsupported = 1;
err = rfkill_register(rfkill_dev);
if (err) {
diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index 50d9019..fe171fa 100644
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -434,7 +434,6 @@
wifi_rfkill->name = "hp-wifi";
wifi_rfkill->state = hp_wmi_wifi_state();
wifi_rfkill->toggle_radio = hp_wmi_wifi_set;
- wifi_rfkill->user_claim_unsupported = 1;
err = rfkill_register(wifi_rfkill);
if (err)
goto add_sysfs_error;
@@ -446,7 +445,6 @@
bluetooth_rfkill->name = "hp-bluetooth";
bluetooth_rfkill->state = hp_wmi_bluetooth_state();
bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set;
- bluetooth_rfkill->user_claim_unsupported = 1;
err = rfkill_register(bluetooth_rfkill);
if (err)
goto register_bluetooth_error;
@@ -457,7 +455,6 @@
wwan_rfkill->name = "hp-wwan";
wwan_rfkill->state = hp_wmi_wwan_state();
wwan_rfkill->toggle_radio = hp_wmi_wwan_set;
- wwan_rfkill->user_claim_unsupported = 1;
err = rfkill_register(wwan_rfkill);
if (err)
goto register_wwan_err;
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index d3c92d7..184e99e 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -1097,7 +1097,6 @@
sony_wifi_rfkill->name = "sony-wifi";
sony_wifi_rfkill->toggle_radio = sony_nc_rfkill_set;
sony_wifi_rfkill->get_state = sony_nc_rfkill_get;
- sony_wifi_rfkill->user_claim_unsupported = 1;
sony_wifi_rfkill->data = (void *)SONY_WIFI;
err = rfkill_register(sony_wifi_rfkill);
if (err)
@@ -1119,7 +1118,6 @@
sony_bluetooth_rfkill->name = "sony-bluetooth";
sony_bluetooth_rfkill->toggle_radio = sony_nc_rfkill_set;
sony_bluetooth_rfkill->get_state = sony_nc_rfkill_get;
- sony_bluetooth_rfkill->user_claim_unsupported = 1;
sony_bluetooth_rfkill->data = (void *)SONY_BLUETOOTH;
err = rfkill_register(sony_bluetooth_rfkill);
if (err)
@@ -1140,7 +1138,6 @@
sony_wwan_rfkill->name = "sony-wwan";
sony_wwan_rfkill->toggle_radio = sony_nc_rfkill_set;
sony_wwan_rfkill->get_state = sony_nc_rfkill_get;
- sony_wwan_rfkill->user_claim_unsupported = 1;
sony_wwan_rfkill->data = (void *)SONY_WWAN;
err = rfkill_register(sony_wwan_rfkill);
if (err)
@@ -1161,7 +1158,6 @@
sony_wimax_rfkill->name = "sony-wimax";
sony_wimax_rfkill->toggle_radio = sony_nc_rfkill_set;
sony_wimax_rfkill->get_state = sony_nc_rfkill_get;
- sony_wimax_rfkill->user_claim_unsupported = 1;
sony_wimax_rfkill->data = (void *)SONY_WIMAX;
err = rfkill_register(sony_wimax_rfkill);
if (err)
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 9f18726..4345089 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -803,7 +803,6 @@
toshiba_acpi.rfk_dev->name = toshiba_acpi.bt_name;
toshiba_acpi.rfk_dev->toggle_radio = bt_rfkill_toggle_radio;
- toshiba_acpi.rfk_dev->user_claim_unsupported = 1;
toshiba_acpi.rfk_dev->data = &toshiba_acpi;
if (hci_get_bt_on(&bt_on) == HCI_SUCCESS && bt_on) {
diff --git a/include/linux/rfkill.h b/include/linux/rfkill.h
index e1ec7d9..de18ef2 100644
--- a/include/linux/rfkill.h
+++ b/include/linux/rfkill.h
@@ -58,9 +58,6 @@
* @type: Radio type which the button controls, the value stored
* here should be a value from enum rfkill_type.
* @state: State of the switch, "UNBLOCKED" means radio can operate.
- * @user_claim_unsupported: Whether the hardware supports exclusive
- * RF-kill control by userspace. Set this before registering.
- * @user_claim: Set when the switch is controlled exlusively by userspace.
* @mutex: Guards switch state transitions. It serializes callbacks
* and also protects the state.
* @data: Pointer to the RF button drivers private data which will be
@@ -83,9 +80,6 @@
const char *name;
enum rfkill_type type;
- bool user_claim_unsupported;
- bool user_claim;
-
/* the mutex serializes callbacks and also protects
* the state */
struct mutex mutex;
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 3eaa394..df1269c 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -200,7 +200,7 @@
rfkill_global_states[type].current_state = state;
list_for_each_entry(rfkill, &rfkill_list, node) {
- if ((!rfkill->user_claim) && (rfkill->type == type)) {
+ if (rfkill->type == type) {
mutex_lock(&rfkill->mutex);
rfkill_toggle_radio(rfkill, state, 0);
mutex_unlock(&rfkill->mutex);
@@ -447,53 +447,14 @@
struct device_attribute *attr,
char *buf)
{
- struct rfkill *rfkill = to_rfkill(dev);
-
- return sprintf(buf, "%d\n", rfkill->user_claim);
+ return sprintf(buf, "%d\n", 0);
}
static ssize_t rfkill_claim_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- struct rfkill *rfkill = to_rfkill(dev);
- unsigned long claim_tmp;
- bool claim;
- int error;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- if (rfkill->user_claim_unsupported)
- return -EOPNOTSUPP;
-
- error = strict_strtoul(buf, 0, &claim_tmp);
- if (error)
- return error;
- claim = !!claim_tmp;
-
- /*
- * Take the global lock to make sure the kernel is not in
- * the middle of rfkill_switch_all
- */
- error = mutex_lock_killable(&rfkill_global_mutex);
- if (error)
- return error;
-
- if (rfkill->user_claim != claim) {
- if (!claim && !rfkill_epo_lock_active) {
- mutex_lock(&rfkill->mutex);
- rfkill_toggle_radio(rfkill,
- rfkill_global_states[rfkill->type].current_state,
- 0);
- mutex_unlock(&rfkill->mutex);
- }
- rfkill->user_claim = claim;
- }
-
- mutex_unlock(&rfkill_global_mutex);
-
- return error ? error : count;
+ return -EOPNOTSUPP;
}
static struct device_attribute rfkill_dev_attrs[] = {
diff --git a/net/wimax/op-rfkill.c b/net/wimax/op-rfkill.c
index 870032f..a3616e2 100644
--- a/net/wimax/op-rfkill.c
+++ b/net/wimax/op-rfkill.c
@@ -364,7 +364,6 @@
rfkill->state = RFKILL_STATE_UNBLOCKED;
rfkill->data = wimax_dev;
rfkill->toggle_radio = wimax_rfkill_toggle_radio;
- rfkill->user_claim_unsupported = 1;
/* Initialize the input device for the hw key */
input_dev = input_allocate_device();