mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
A mirror of the official Linux kernel repository just in case
d590c23111
The original motivation for disabling/enabling Link PM at device suspend/resume was to force link state to go via U0 before suspend sets the link state to U3. Going directly from U2 to U3 is not allowed. Disabling LPM will forced the link state to U0, but will send a lot of Set port feature requests for evert suspend and resume. This is not needed as Hub hardware will take care of going via U0 when a U2 -> U3 transition is requested [1] [1] USB 3.1 specification section 10.16.2.10 Set Port Feature: "If the value is 3, then host software wants to selectively suspend the device connected to this port. The hub shall transition the link to U3 from any of the other U states using allowed link state transitions. If the port is not already in the U0 state, then it shall transition the port to the U0 state and then initiate the transition to U3. While this state is active, the hub does not propagate downstream-directed traffic to this port, but the hub will respond to resume signaling from the port" Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.