7bd9fb058d
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> |
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| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.