linux-stable/drivers/hid/intel-ish-hid
Gwendal Grignou 0cd8232c66 HID: intel-ish-hid: Use dma_alloc_coherent for firmware update
commit f97ec5d75e 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 91b228107d ("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>
2022-04-08 13:57:17 +02:00
..
ipc HID: intel-ish-hid: ipc: Specify no cache snooping on TGL and ADL 2022-01-06 15:39:43 +01:00
ishtp HID: intel-ish-hid: fix module device-id handling 2021-11-11 22:45:40 +01:00
Kconfig HID: intel-ish-hid: Set ISH driver depends on x86 2021-06-14 15:55:09 +02:00
Makefile treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
ishtp-fw-loader.c HID: intel-ish-hid: Use dma_alloc_coherent for firmware update 2022-04-08 13:57:17 +02:00
ishtp-hid-client.c HID: intel-ish-hid: fix module device-id handling 2021-11-11 22:45:40 +01:00
ishtp-hid.c HID: intel-ish-hid: Fix potential copy/paste error 2021-04-07 17:56:34 +02:00
ishtp-hid.h HID: intel-ish-hid: use async resume function 2021-07-15 20:49:09 +02:00