diff options
| author | Hui Wang <hui.wang@canonical.com> | 2021-02-03 11:02:45 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2021-02-03 16:34:02 +0300 |
| commit | 7bd9fb058d77213130e4b3e594115c028b708e7e (patch) | |
| tree | 04fb8ba8bf87ffae192f2dee3f0a08739d23e658 /drivers/bluetooth | |
| parent | b1810febda94cae09e1095d02fad3be00ce93b6d (diff) | |
| download | linux-7bd9fb058d77213130e4b3e594115c028b708e7e.tar.xz | |
Bluetooth: btusb: Fix the autosuspend enable and disable
I tried to disable the autosuspend on btusb through the module
parameter enable_autosuspend, this parameter is set to N, but the usb
bluetooth device is still runtime suspended.
$ cat /sys/module/btusb/parameters/enable_autosuspend
N
$ cat /sys/bus/usb/devices/3-10/power/runtime_status
suspended
$ cat /sys/bus/usb/devices/3-10/power/runtime_suspended_time
65187
We already set ".supports_autosuspend = 1" in the usb_driver, this
device will be set autosuspend enabled by usb core, we don't need
to call usb_enable_autosuspend() in the btusb_probe(). Instead if
users set the parameter enable_autosuspend to N, we need to call
usb_disable_autosuspend() in the btusb_probe(). After this change
and set the parameter to N, we could see the device is not runtime
suspended anymore.
$ cat /sys/module/btusb/parameters/enable_autosuspend
N
$ cat /sys/bus/usb/devices/3-10/power/runtime_status
active
$ cat /sys/bus/usb/devices/3-10/power/runtime_suspended_time
0
And if we disable the autosuspend in the btusb_probe(), we need to
enable the autosuspend in the disconnect(), this could guarantee
that the device could be runtime suspended after we rmmod the btusb.
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btusb.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 2b615668ae36..5a33fb6842a2 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -4840,8 +4840,8 @@ static int btusb_probe(struct usb_interface *intf, data->diag = NULL; } - if (enable_autosuspend) - usb_enable_autosuspend(data->udev); + if (!enable_autosuspend) + usb_disable_autosuspend(data->udev); err = hci_register_dev(hdev); if (err < 0) @@ -4901,6 +4901,9 @@ static void btusb_disconnect(struct usb_interface *intf) gpiod_put(data->reset_gpio); hci_free_dev(hdev); + + if (!enable_autosuspend) + usb_enable_autosuspend(data->udev); } #ifdef CONFIG_PM |