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| author | Hans de Goede <hdegoede@redhat.com> | 2021-01-28 17:33:12 +0100 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2021-01-29 16:37:00 +0100 |
| commit | 219991e6be7f4a31d471611e265b72f75b2d0538 (patch) | |
| tree | b621ebf7e8cb7ad6cd56f5d0230f937bcd101d18 /include/net/bluetooth | |
| parent | 98d2c3e1731007acf03addf83c863df6694beb95 (diff) | |
| download | linux-219991e6be7f4a31d471611e265b72f75b2d0538.tar.bz2 | |
Bluetooth: Add new HCI_QUIRK_NO_SUSPEND_NOTIFIER quirk
Some devices, e.g. the RTL8723BS bluetooth part, some USB attached devices,
completely drop from the bus on a system-suspend. These devices will
have their driver unbound and rebound on resume (when the dropping of
the bus gets detected) and will show up as a new HCI after resume.
These devices do not benefit from the suspend / resume handling work done
by the hci_suspend_notifier. At best this unnecessarily adds some time to
the suspend/resume time. But this may also actually cause problems, if the
code doing the driver unbinding runs after the pm-notifier then the
hci_suspend_notifier code will try to talk to a device which is now in
an uninitialized state.
This commit adds a new HCI_QUIRK_NO_SUSPEND_NOTIFIER quirk which allows
drivers to opt-out of the hci_suspend_notifier when they know beforehand
that their device will be fully re-initialized / reprobed on resume.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'include/net/bluetooth')
| -rw-r--r-- | include/net/bluetooth/hci.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index c1504aa3d9cf..ba2f439bc04d 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -238,6 +238,14 @@ enum { * during the hdev->setup vendor callback. */ HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, + + /* + * When this quirk is set, then the hci_suspend_notifier is not + * registered. This is intended for devices which drop completely + * from the bus on system-suspend and which will show up as a new + * HCI after resume. + */ + HCI_QUIRK_NO_SUSPEND_NOTIFIER, }; /* HCI device flags */ |