29d84944ca
In some circumstances, Tx traffic is sent without associated station but
the station exists when the Tx status is received. Beside that, the
driver keep a counter associated to each station. So, in this case, the
counter is not incremented, but is decremented. In this case a warning
"inconsistent notification" appears:
------------[ cut here ]------------
WARNING: CPU: 3 PID: 82 at /home/jerome/wfx/data_tx.c:469 wfx_skb_dtor+0x1a4/0x1d4 [wfx]
inconsistent notification
Modules linked in: [...]
CPU: 3 PID: 82 Comm: kworker/3:1H Tainted: G C O 4.19.57-v7l+ #1244
Hardware name: BCM2835
Workqueue: events_highpri bh_work [wfx]
[<c0212c8c>] (unwind_backtrace) from [<c020d49c>] (show_stack+0x20/0x24)
[<c020d49c>] (show_stack) from [<c0976220>] (dump_stack+0xd4/0x118)
[<c0976220>] (dump_stack) from [<c0222270>] (__warn+0x104/0x11c)
[<c0222270>] (__warn) from [<c02222e0>] (warn_slowpath_fmt+0x58/0x74)
[<c02222e0>] (warn_slowpath_fmt) from [<bf497b48>] (wfx_skb_dtor+0x1a4/0x1d4 [wfx])
[<bf497b48>] (wfx_skb_dtor [wfx]) from [<bf4988b4>] (wfx_tx_confirm_cb+0x198/0x2f0 [wfx])
[<bf4988b4>] (wfx_tx_confirm_cb [wfx]) from [<bf49d054>] (hif_tx_confirm+0x50/0x70 [wfx])
[<bf49d054>] (hif_tx_confirm [wfx]) from [<bf49d42c>] (wfx_handle_rx+0x128/0x22c [wfx])
[<bf49d42c>] (wfx_handle_rx [wfx]) from [<bf4953cc>] (bh_work+0x3cc/0x964 [wfx])
[<bf4953cc>] (bh_work [wfx]) from [<c023dab8>] (process_one_work+0x170/0x458)
[<c023dab8>] (process_one_work) from [<c023ddfc>] (worker_thread+0x5c/0x5a4)
[<c023ddfc>] (worker_thread) from [<c02440e8>] (kthread+0x138/0x168)
[<c02440e8>] (kthread) from [<c02010ac>] (ret_from_fork+0x14/0x28)
Exception stack(0xee199fb0 to 0xee199ff8)
9fa0: 00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
---[ end trace 64b9e754e12ef7de ]---
This patch fix this race between the station creation and the Tx data.
Fixes:
|
||
|---|---|---|
| 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.