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Martin Kennedy 0d4a0250df mpc85xx: Drop pci aliases to avoid domain changes
As of upstream Linux commit 0fe1e96fef0a ("powerpc/pci: Prefer PCI
domain assignment via DT 'linux,pci-domain' and alias"), the PCIe
domain address is no longer numbered by the lowest 16 bits of the PCI
register address after a fallthrough. Instead of the fallthrough, the
enumeration process accepts the alias ID (as determined by
`of_alias_scan()`). This causes e.g.:

9000:00:00.0 PCI bridge: Freescale Semiconductor Inc P1020E (rev 11)
9000:01:00.0 Network controller: Qualcomm Atheros AR958x 802.11abgn ...

to become

0000:00:00.0 PCI bridge: Freescale Semiconductor Inc P1020E (rev 11)
0000:01:00.0 Network controller: Qualcomm Atheros AR958x 802.11abgn ...

... which then causes the sysfs path of the netdev to change,
invalidating the `wifi_device.path`s enumerated in
`/etc/config/wireless`.

One other solution might be to migrate the uci configuration, as was
done for mvebu in commit 0bd5aa89fc ("mvebu: Migrate uci config to
new PCIe path"). However, there are concerns that the sysfs path will
change once again once some upstream patches[^2][^3] are merged and
backported (and `CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT` is enabled).

Instead, remove the aliases and allow the fallthrough to continue for
now. We will provide a migration in a later release.

This was first reported as a Github issue[^1].

[^1]: https://github.com/openwrt/openwrt/issues/10530
[^2]: https://lore.kernel.org/linuxppc-dev/20220706104308.5390-1-pali@kernel.org/t/#u
[^3]: https://lore.kernel.org/linuxppc-dev/20220706101043.4867-1-pali@kernel.org/

Fixes: #10530
Tested-by: Martin Kennedy <hurricos@gmail.com>
[Tested on the Aerohive HiveAP 330 and Extreme Networks WS-AP3825i]
Signed-off-by: Martin Kennedy <hurricos@gmail.com>
(cherry picked from commit 7f4b4c29f3)
Signed-off-by: Fabian Bläse <fabian@blaese.de>
2023-02-08 09:40:05 +01:00
.github CI: build: fix external toolchain use with release tag tests 2023-01-04 19:35:17 +01:00
config toolchain: Select USE_SSTRIP with external musl toolchain 2022-12-06 01:01:12 +01:00
include kernel: bump 5.4 to 5.4.230 2023-01-28 19:26:47 +01:00
LICENSES LICENSES: include all used licenses in LICENSES directory 2021-02-14 19:21:38 +01:00
package opkg: add patch to avoid remove package repeatly with force 2023-01-06 17:34:46 +01:00
scripts scripts/dl_github_archieve.py: fix generating unreproducible tar 2023-01-12 15:00:55 +01:00
target mpc85xx: Drop pci aliases to avoid domain changes 2023-02-08 09:40:05 +01:00
toolchain toolchain: Include ./include/fortify for external musl toolchain 2022-12-04 16:07:33 +01:00
tools tools/mkimage: fix build on MacOS arm64 2022-12-09 03:25:49 +01:00
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 2012-05-08 13:30:49 +00:00
.gitignore gitignore: add .vscode for VS Code users 2021-03-29 22:26:27 +02:00
BSDmakefile build: use SPDX license tags 2021-02-05 14:54:47 +01:00
Config.in build: use SPDX license tags 2021-02-05 14:54:47 +01:00
COPYING COPYING: add COPYING file to specify project licenses 2021-02-14 19:21:38 +01:00
feeds.conf.default OpenWrt v21.02.5: revert to branch defaults 2022-10-15 15:02:49 +02:00
Makefile Makefile: fix stray \ warnings with grep-3.8 2022-09-29 19:44:09 +02:00
README.md README: switch from freenode to oftc 2021-06-12 12:41:29 -10:00
rules.mk rules_mk: use gcc versions for external toolchain 2022-12-04 16:07:33 +01:00

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