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Bluetooth: btusb: Restore QCA Rome suspend/resume fix with a "rewritten" version

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Commit 7d06d5895c ("Revert "Bluetooth: btusb: fix QCA...suspend/resume"")
removed the setting of the BTUSB_RESET_RESUME quirk for QCA Rome devices,
instead favoring adding USB_QUIRK_RESET_RESUME quirks in usb/core/quirks.c.

This was done because the DIY BTUSB_RESET_RESUME reset-resume handling
has several issues (see the original commit message). An added advantage
of moving over to the USB-core reset-resume handling is that it also
disables autosuspend for these devices, which is similarly broken on these.

But there are 2 issues with this approach:
1) It leaves the broken DIY BTUSB_RESET_RESUME code in place for Realtek
   devices.
2) Sofar only 2 of the 10 QCA devices known to the btusb code have been
   added to usb/core/quirks.c and if we fix the Realtek case the same way
   we need to add an additional 14 entries. So in essence we need to
   duplicate a large part of the usb_device_id table in btusb.c in
   usb/core/quirks.c and manually keep them in sync.

This commit instead restores setting a reset-resume quirk for QCA devices
in the btusb.c code, avoiding the duplicate usb_device_id table problem.

This commit avoids the problems with the original DIY BTUSB_RESET_RESUME
code by simply setting the USB_QUIRK_RESET_RESUME quirk directly on the
usb_device.

This commit also moves the BTUSB_REALTEK case over to directly setting the
USB_QUIRK_RESET_RESUME on the usb_device and removes the now unused
BTUSB_RESET_RESUME code.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1514836
Fixes: 7d06d5895c ("Revert "Bluetooth: btusb: fix QCA...suspend/resume"")
Cc: stable@vger.kernel.org
Cc: Leif Liddy <leif.linux@gmail.com>
Cc: Matthias Kaehlcke <mka@chromium.org>
Cc: Brian Norris <briannorris@chromium.org>
Cc: Daniel Drake <drake@endlessm.com>
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Hans de Goede 2018-01-08 10:44:16 +01:00 committed by Marcel Holtmann
parent 948c7ca03c
commit 61f5acea87
1 changed files with 10 additions and 12 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

22
drivers/bluetooth/btusb.c
View file

@ -23,6 +23,7 @@
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/quirks.h>
#include <linux/firmware.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
@ -390,9 +391,8 @@ static const struct usb_device_id blacklist_table[] = {
#define BTUSB_FIRMWARE_LOADED 7
#define BTUSB_FIRMWARE_FAILED 8
#define BTUSB_BOOTING 9
#define BTUSB_RESET_RESUME 10
#define BTUSB_DIAG_RUNNING 11
#define BTUSB_OOB_WAKE_ENABLED 12
#define BTUSB_DIAG_RUNNING 10
#define BTUSB_OOB_WAKE_ENABLED 11
struct btusb_data {
struct hci_dev *hdev;
@ -3120,6 +3120,12 @@ static int btusb_probe(struct usb_interface *intf,
if (id->driver_info & BTUSB_QCA_ROME) {
data->setup_on_usb = btusb_setup_qca;
hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
/* QCA Rome devices lose their updated firmware over suspend,
* but the USB hub doesn't notice any status change.
* explicitly request a device reset on resume.
*/
interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
}
#ifdef CONFIG_BT_HCIBTUSB_RTL
@ -3130,7 +3136,7 @@ static int btusb_probe(struct usb_interface *intf,
* but the USB hub doesn't notice any status change.
* Explicitly request a device reset on resume.
*/
set_bit(BTUSB_RESET_RESUME, &data->flags);
interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
}
#endif
@ -3299,14 +3305,6 @@ static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
enable_irq(data->oob_wake_irq);
}
/* Optionally request a device reset on resume, but only when
* wakeups are disabled. If wakeups are enabled we assume the
* device will stay powered up throughout suspend.
*/
if (test_bit(BTUSB_RESET_RESUME, &data->flags) &&
!device_may_wakeup(&data->udev->dev))
data->udev->reset_resume = 1;
return 0;
}