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[ Upstream commit d98ddae85a ]
In a multiradio board with one QCA9984 and one AR9987
after enabling the crashdump with module parameter
coredump_mask=7, below backtrace is seen.
vmalloc: allocation failure: 0 bytes
kworker/u4:0: page allocation failure: order:0, mode:0x80d2
CPU: 0 PID: 6 Comm: kworker/u4:0 Not tainted 3.14.77 #130
Workqueue: ath10k_wq ath10k_core_register_work [ath10k_core]
(unwind_backtrace) from [<c021abf8>] (show_stack+0x10/0x14)
(dump_stack+0x80/0xa0)
(warn_alloc_failed+0xd0/0xfc)
(__vmalloc_node_range+0x1b4/0x1d8)
(__vmalloc_node+0x34/0x40)
(vzalloc+0x24/0x30)
(ath10k_coredump_register+0x6c/0x88 [ath10k_core])
(ath10k_core_register_work+0x350/0xb34 [ath10k_core])
(process_one_work+0x20c/0x32c)
(worker_thread+0x228/0x360)
This is due to ath10k_hw_mem_layout is not defined for AR9987.
For coredump undefined hw ramdump_size is 0.
Check for the ramdump_size before allocation memory.
Tested on: AR9987, QCA9984
FW version: 10.4-3.9.0.2-00044
Signed-off-by: Anilkumar Kolli <akolli@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.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.