No description
Find a file
Joakim Andersson 10841b9a14 Bluetooth: host: Release ATT request buffers once sent
The ATT request buffers are held until the ATT response has been
received. This means that the ATT request buffers are released by the
RX thread, instead of the from the RX priority context of
num_complete.
This can cause a deadlock in the RX thread when we allocate buffers
and all the available buffers are ATT requests, since the RX thread is
the only thread that can release buffers.

Release the ATT request buffers once they have been sent and instead
handle ATT request resending by reconstructing the buffer from the
GATT parameters.

Also re-order the order of resource allocation by allocating the
request context before the buffer. This ensures that we cannot
allocate more buffers for ATT requests than there are ATT requests.

Fixed a buf reference leak that could occur when the ATT request buffer
has been allocated, but GATT returns an error before handing the
responsebility of the buffer to ATT, for example when bt_att_req_alloc
fails.
This is fixed by moving the functionality of att_req_destroy to
bt_att_req_free.

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
2021-02-11 12:59:01 -05:00
.buildkite ci: restore number of workers 2021-02-01 11:39:29 -05:00
.github labels: label release note changes 2021-02-08 11:49:49 -05:00
.known-issues doc: update known-issues for Sphinx==3.3.0 2020-11-03 15:27:37 +01:00
arch license: add missing SPDX headers 2021-02-11 08:05:16 -05:00
boards boards: nrf: fix incorrect debug docs 2021-02-10 10:14:59 -05:00
cmake renode: fix dependencies for renode platforms 2021-02-08 21:03:48 -05:00
doc release notes: add top level bullets, misc. changes 2021-02-11 12:55:18 -05:00
drivers drivers: serial: nrfx_uarte: Add missing check 2021-02-11 08:52:36 -05:00
dts dts/arm: stm32f2: Fix usart1 clock 2021-02-05 08:25:39 -05:00
include license: add missing SPDX headers 2021-02-11 08:05:16 -05:00
kernel kernel/sched: Add missing lock around waitq unpend calls 2021-02-10 07:43:18 -05:00
lib license: add missing SPDX headers 2021-02-11 08:05:16 -05:00
misc toolchain: add GEN_ABSOLUTE_SYM_KCONFIG() 2021-02-02 09:23:45 -05:00
modules modules: cmsis-dsp: Support compiling on native posix 2021-01-27 14:48:37 -05:00
samples samples: driver: watchdog: rework how callback support is handled 2021-02-09 13:43:55 -05:00
scripts scripts: kconfig: Fix uses of edt.compat2okay in helper functions 2021-02-09 13:33:10 -05:00
share cmake: Zephyr CMake package clean-up and minor fix 2020-08-19 12:52:33 -04:00
soc m2gl025_miv: Adjust frequencies and performance 2021-02-09 19:41:27 -05:00
subsys Bluetooth: host: Release ATT request buffers once sent 2021-02-11 12:59:01 -05:00
tests Bluetooth: ATT: Remove BT_ATT_TX_MAX 2021-02-11 12:59:01 -05:00
.checkpatch.conf checkpatch: ignore MULTISTATEMENT_MACRO_USE_DO_WHILE 2021-02-07 09:48:44 -05:00
.clang-format clang-format: Update with latest FOR_EACH macro list 2020-05-02 11:23:13 -04:00
.codecov.yml ci: add .codecov.yml for codecov.io configuration 2018-01-03 13:12:03 -05:00
.editorconfig editorconfig: indent Kconfig files with tabs 2020-07-08 21:30:38 -04:00
.gitattributes gitattributes: Tell linguist to ignore test pattern files 2020-04-23 14:07:57 -04:00
.gitignore gitignore: add twister-out 2020-12-11 14:13:02 -05:00
.gitlint gitlint: match max title length restriction with checkpatch 2019-05-29 14:43:16 -04:00
.mailmap mailmap: add entry for Sean Nyekjaer 2019-11-04 14:33:31 +01:00
.uncrustify.cfg uncrustify: Add a rule to remove space inside function argument 2018-10-16 09:50:03 -04:00
CMakeLists.txt cmake: show memory usage on zephyr.elf always 2021-02-02 16:45:51 -05:00
CODE_OF_CONDUCT.md coc: move to markdown format 2019-01-24 15:37:15 -05:00
CODEOWNERS CODEOWNERS: cleanup and replacing few entries 2021-02-02 08:47:25 -05:00
CONTRIBUTING.rst doc: Fixed a link in CONTRIBUTING.rst 2019-02-28 12:46:04 -08:00
Kconfig kconfig: Clean up header comments and make them consistent 2019-11-04 17:31:27 -05:00
Kconfig.zephyr boards: x86: depend on CONFIG_BUILD_OUTPUT_EFI 2021-01-26 21:41:14 -05:00
LICENSE add top level Apache 2.0 license file 2016-02-05 20:24:37 -05:00
MAINTAINERS.yml MAINTAINER: maintainer file updates 2021-02-02 13:59:22 -05:00
Makefile (docs) Makefile: re-order targets to build htmldocs-fast by default 2021-02-09 08:01:16 -05:00
README.rst doc: Replace shippable badge with buildkite badge 2020-07-14 07:21:44 -05:00
VERSION release: bump version to 2.5.0-rc3 2021-02-07 11:27:06 -05:00
version.h.in cmake: explain BUILD_VERSION and KERNEL_VERSION_* 2019-05-09 11:52:05 +02:00
west.yml manifest: openthread upmerge up to commit add99687 2021-02-08 11:36:45 -05:00
zephyr-env.cmd scripts: remove west from scripts/ 2019-01-29 10:15:01 +01:00
zephyr-env.sh zephyr_env.sh: Remove semicolons at ends of lines 2019-12-10 14:34:46 -08:00

.. raw:: html

   <a href="https://www.zephyrproject.org">
     <p align="center">
       <img src="doc/images/Zephyr-Project.png">
     </p>
   </a>

   <a href="https://bestpractices.coreinfrastructure.org/projects/74"><img
   src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
   <a href="https://buildkite.com/zephyr/zephyr">
   <img
   src="https://badge.buildkite.com/f5bd0dc88306cee17c9b38e78d11bb74a6291e3f40e7d13f31.svg?branch=master"></a>


The Zephyr Project is a scalable real-time operating system (RTOS) supporting
multiple hardware architectures, optimized for resource constrained devices,
and built with security in mind.

The Zephyr OS is based on a small-footprint kernel designed for use on
resource-constrained systems: from simple embedded environmental sensors and
LED wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr kernel supports multiple architectures, including ARM Cortex-M,
Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V, and a large number of
`supported boards`_.

.. below included in doc/introduction/introduction.rst

.. start_include_here

Getting Started
***************

Welcome to Zephyr! See the `Introduction to Zephyr`_ for a high-level overview,
and the documentation's `Getting Started Guide`_ to start developing.

Community Support
*****************

Community support is provided via mailing lists and Slack; see the Resources
below for details.

.. _project-resources:

Resources
*********

Here's a quick summary of resources to help you find your way around:

* **Help**: `Asking for Help Tips`_
* **Documentation**: http://docs.zephyrproject.org (`Getting Started Guide`_)
* **Source Code**: https://github.com/zephyrproject-rtos/zephyr is the main
  repository; https://elixir.bootlin.com/zephyr/latest/source contains a
  searchable index
* **Releases**: https://github.com/zephyrproject-rtos/zephyr/releases
* **Samples and example code**: see `Sample and Demo Code Examples`_
* **Mailing Lists**: users@lists.zephyrproject.org and
  devel@lists.zephyrproject.org are the main user and developer mailing lists,
  respectively. You can join the developer's list and search its archives at
  `Zephyr Development mailing list`_. The other `Zephyr mailing list
  subgroups`_ have their own archives and sign-up pages.
* **Nightly CI Build Status**: https://lists.zephyrproject.org/g/builds
  The builds@lists.zephyrproject.org mailing list archives the CI
  (shippable) nightly build results.
* **Chat**: Zephyr's Slack workspace is https://zephyrproject.slack.com.  Use
  this `Slack Invite`_ to register.
* **Contributing**: see the `Contribution Guide`_
* **Wiki**: `Zephyr GitHub wiki`_
* **Issues**: https://github.com/zephyrproject-rtos/zephyr/issues
* **Security Issues**: Email vulnerabilities@zephyrproject.org to report
  security issues; also see our `Security`_ documentation. Security issues are
  tracked separately at https://zephyrprojectsec.atlassian.net.
* **Zephyr Project Website**: https://zephyrproject.org

.. _Slack Invite: https://tinyurl.com/y5glwylp
.. _supported boards: http://docs.zephyrproject.org/latest/boards/index.html
.. _Zephyr Documentation: http://docs.zephyrproject.org
.. _Introduction to Zephyr: http://docs.zephyrproject.org/latest/introduction/index.html
.. _Getting Started Guide: http://docs.zephyrproject.org/latest/getting_started/index.html
.. _Contribution Guide: http://docs.zephyrproject.org/latest/contribute/index.html
.. _Zephyr GitHub wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
.. _Zephyr Development mailing list: https://lists.zephyrproject.org/g/devel
.. _Zephyr mailing list subgroups: https://lists.zephyrproject.org/g/main/subgroups
.. _Sample and Demo Code Examples: http://docs.zephyrproject.org/latest/samples/index.html
.. _Security: http://docs.zephyrproject.org/latest/security/index.html
.. _Asking for Help Tips: https://docs.zephyrproject.org/latest/guides/getting-help.html