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This reverts commit5188d5453b, because it introduced lock recursion: BUG: spinlock recursion on CPU#2, kworker/u13:1/395 lock: 0xffffffc0e28a47f0, .magic: dead4ead, .owner: kworker/u13:1/395, .owner_cpu: 2 CPU: 2 PID: 395 Comm: kworker/u13:1 Not tainted 4.20.0-rc4+ #2 Hardware name: Google Kevin (DT) Workqueue: MWIFIEX_RX_WORK_QUEUE mwifiex_rx_work_queue [mwifiex] Call trace: dump_backtrace+0x0/0x140 show_stack+0x20/0x28 dump_stack+0x84/0xa4 spin_bug+0x98/0xa4 do_raw_spin_lock+0x5c/0xdc _raw_spin_lock_irqsave+0x38/0x48 mwifiex_flush_data+0x2c/0xa4 [mwifiex] call_timer_fn+0xcc/0x1c4 run_timer_softirq+0x264/0x4f0 __do_softirq+0x1a8/0x35c do_softirq+0x54/0x64 netif_rx_ni+0xe8/0x120 mwifiex_recv_packet+0xfc/0x10c [mwifiex] mwifiex_process_rx_packet+0x1d4/0x238 [mwifiex] mwifiex_11n_dispatch_pkt+0x190/0x1ac [mwifiex] mwifiex_11n_rx_reorder_pkt+0x28c/0x354 [mwifiex] mwifiex_process_sta_rx_packet+0x204/0x26c [mwifiex] mwifiex_handle_rx_packet+0x15c/0x16c [mwifiex] mwifiex_rx_work_queue+0x104/0x134 [mwifiex] worker_thread+0x4cc/0x72c kthread+0x134/0x13c ret_from_fork+0x10/0x18 This was clearly not tested well at all. I simply performed 'wget' in a loop and it fell over within a few seconds. Fixes:5188d5453b("mwifiex: restructure rx_reorder_tbl_lock usage") Cc: <stable@vger.kernel.org> Cc: Ganapathi Bhat <gbhat@marvell.com> Signed-off-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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.