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authorJohannes Berg <johannes@sipsolutions.net>2009-06-02 13:01:37 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-06-03 14:06:13 -0400
commit19d337dff95cbf76edd3ad95c0cee2732c3e1ec5 (patch)
tree33326eeb09cb9664cc8427a5dc7cd2b08b5a57c3 /drivers/net/usb
parent0f6399c4c525b518644a9b09f8d6fb125a418c4d (diff)
downloadop-kernel-dev-19d337dff95cbf76edd3ad95c0cee2732c3e1ec5.zip
op-kernel-dev-19d337dff95cbf76edd3ad95c0cee2732c3e1ec5.tar.gz
rfkill: rewrite
This patch completely rewrites the rfkill core to address the following deficiencies: * all rfkill drivers need to implement polling where necessary rather than having one central implementation * updating the rfkill state cannot be done from arbitrary contexts, forcing drivers to use schedule_work and requiring lots of code * rfkill drivers need to keep track of soft/hard blocked internally -- the core should do this * the rfkill API has many unexpected quirks, for example being asymmetric wrt. alloc/free and register/unregister * rfkill can call back into a driver from within a function the driver called -- this is prone to deadlocks and generally should be avoided * rfkill-input pointlessly is a separate module * drivers need to #ifdef rfkill functions (unless they want to depend on or select RFKILL) -- rfkill should provide inlines that do nothing if it isn't compiled in * the rfkill structure is not opaque -- drivers need to initialise it correctly (lots of sanity checking code required) -- instead force drivers to pass the right variables to rfkill_alloc() * the documentation is hard to read because it always assumes the reader is completely clueless and contains way TOO MANY CAPS * the rfkill code needlessly uses a lot of locks and atomic operations in locked sections * fix LED trigger to actually change the LED when the radio state changes -- this wasn't done before Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> [thinkpad] Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/usb')
-rw-r--r--drivers/net/usb/hso.c42
1 files changed, 22 insertions, 20 deletions
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index 837135f..5ddd8c4 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -2481,10 +2481,10 @@ static int add_net_device(struct hso_device *hso_dev)
return 0;
}
-static int hso_radio_toggle(void *data, enum rfkill_state state)
+static int hso_rfkill_set_block(void *data, bool blocked)
{
struct hso_device *hso_dev = data;
- int enabled = (state == RFKILL_STATE_UNBLOCKED);
+ int enabled = !blocked;
int rv;
mutex_lock(&hso_dev->mutex);
@@ -2498,6 +2498,10 @@ static int hso_radio_toggle(void *data, enum rfkill_state state)
return rv;
}
+static const struct rfkill_ops hso_rfkill_ops = {
+ .set_block = hso_rfkill_set_block,
+};
+
/* Creates and sets up everything for rfkill */
static void hso_create_rfkill(struct hso_device *hso_dev,
struct usb_interface *interface)
@@ -2506,29 +2510,25 @@ static void hso_create_rfkill(struct hso_device *hso_dev,
struct device *dev = &hso_net->net->dev;
char *rfkn;
- hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
- RFKILL_TYPE_WWAN);
- if (!hso_net->rfkill) {
- dev_err(dev, "%s - Out of memory\n", __func__);
- return;
- }
rfkn = kzalloc(20, GFP_KERNEL);
- if (!rfkn) {
- rfkill_free(hso_net->rfkill);
- hso_net->rfkill = NULL;
+ if (!rfkn)
dev_err(dev, "%s - Out of memory\n", __func__);
- return;
- }
+
snprintf(rfkn, 20, "hso-%d",
interface->altsetting->desc.bInterfaceNumber);
- hso_net->rfkill->name = rfkn;
- hso_net->rfkill->state = RFKILL_STATE_UNBLOCKED;
- hso_net->rfkill->data = hso_dev;
- hso_net->rfkill->toggle_radio = hso_radio_toggle;
+
+ hso_net->rfkill = rfkill_alloc(rfkn,
+ &interface_to_usbdev(interface)->dev,
+ RFKILL_TYPE_WWAN,
+ &hso_rfkill_ops, hso_dev);
+ if (!hso_net->rfkill) {
+ dev_err(dev, "%s - Out of memory\n", __func__);
+ kfree(rfkn);
+ return;
+ }
if (rfkill_register(hso_net->rfkill) < 0) {
+ rfkill_destroy(hso_net->rfkill);
kfree(rfkn);
- hso_net->rfkill->name = NULL;
- rfkill_free(hso_net->rfkill);
hso_net->rfkill = NULL;
dev_err(dev, "%s - Failed to register rfkill\n", __func__);
return;
@@ -3165,8 +3165,10 @@ static void hso_free_interface(struct usb_interface *interface)
hso_stop_net_device(network_table[i]);
cancel_work_sync(&network_table[i]->async_put_intf);
cancel_work_sync(&network_table[i]->async_get_intf);
- if (rfk)
+ if (rfk) {
rfkill_unregister(rfk);
+ rfkill_destroy(rfk);
+ }
hso_free_net_device(network_table[i]);
}
}
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