f51ab2f60a
commit f97ec5d75e9261a5da78dc28a8955b7cc0c4468b upstream.
Allocating memory with kmalloc and GPF_DMA32 is not allowed, the
allocator will ignore the attribute.
Instead, use dma_alloc_coherent() API as we allocate a small amount of
memory to transfer firmware fragment to the ISH.
On Arcada chromebook, after the patch the warning:
"Unexpected gfp: 0x4 (GFP_DMA32). Fixing up to gfp: 0xcc0 (GFP_KERNEL). Fix your code!"
is gone. The ISH firmware is loaded properly and we can interact with
the ISH:
> ectool --name cros_ish version
...
Build info: arcada_ish_v2.0.3661+3c1a1c1ae0 2022-02-08 05:37:47 @localhost
Tool version: v2.0.12300-900b03ec7f 2022-02-08 10:01:48 @localhost
Fixes: commit 91b228107da3 ("HID: intel-ish-hid: ISH firmware loader client driver")
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.