On a Realtek USB bluetooth device, I wanted a simple and consistent way to put the device in reset during suspend (2 reasons: to save power and disable BT as a wakeup source). Resetting it in the suspend callback causes a detach and the resume callback is not called. Hence the changes in this series to do the reset in suspend_noirq. I looked into using PERSIST and reset on resume but those seem mainly for misbehaving devices that reset themselves. This patch series has been tested with Realtek BT hardware as well as Intel BT (test procedure = disable as wake source, user suspend and observe a detach + reattach on resume). Abhishek Pandit-Subedi (2): usb: support suspend_noirq Bluetooth: btusb: Reset realtek devices on user suspend drivers/bluetooth/btusb.c | 26 ++++++++++++++++++ drivers/usb/core/driver.c | 56 +++++++++++++++++++++++++++++++++++++++ drivers/usb/core/usb.c | 6 +++++ include/linux/pm.h | 8 ++++++ include/linux/usb.h | 3 +++ 5 files changed, 99 insertions(+) -- 2.23.0.237.gc6a4ce50a0-goog
