mirror of
https://github.com/torvalds/linux.git
synced 2026-03-08 06:04:44 +01:00
Linux kernel source tree
2372f1caec
Currently gadget_wakeup() waits for U0 synchronously if it was
called from func_wakeup(), this is because we need to send the
function wakeup command soon after the link is active. And the
call is made synchronous by polling DSTS continuosly for 20000
times in __dwc3_gadget_wakeup(). But it observed that sometimes
the link is not active even after polling 20K times, leading to
remote wakeup failures. Adding a small delay between each poll
helps, but that won't guarantee resolution in future. Hence make
the gadget_wakeup completely asynchronous.
Since multiple interfaces can issue a function wakeup at once,
add a new variable wakeup_pending_funcs which will indicate the
functions that has issued func_wakup, this is represented in a
bitmap format. If the link is in U3, dwc3_gadget_func_wakeup()
will set the bit corresponding to interface_id and bail out.
Once link comes back to U0, linksts_change irq is triggered,
where the function wakeup command is sent based on bitmap.
Cc: stable <stable@kernel.org>
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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 reStructuredText 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.