Hi Juerg,
It now attempts to load the driver, but fails:
---
[    8.163942] ath9k 0000:01:00.0: enabling device (0000 -> 0002)
[    8.163960] ath9k: 32-bit DMA not available
[    8.173575] ath9k: probe of 0000:01:00.0 failed with error -5
---

On Tue, May 11, 2021 at 8:55 AM Juerg Haefliger <email address hidden>
wrote:

> Can you try the test kernel from:
> https://kernel.ubuntu.com/~juergh/lp1927037/
>
> Download and install linux-image and linux-modules.
>
>
> ** Description changed:
>
> + [Impact]
> +
> + PCIe cards based on ath9k chips are not recognized.
> +
> + [Test Case]
> +
> + Plug a ath9k based PCIe card into the PCIe slot of a CM4 IO board and:
> + $ ls /sys/class/net/wlan0
> + ls: cannot access '/sys/class/net/wlan0': No such file or directory
> +
> + [Where Problems Could Occur]
> +
> + Buggy driver could result in crashes.
> +
> + [Original Description]
> +
>   Expected behavior:
>   Network adapter should be visible via `iw list`, `iwconfig`, and
> `ifconfig`.
>
>   Actual behavior:
>   Network adapter is visible in `lspci` and `lshw`, but not in `iw list`,
> `iwconfig`, or `ifconfig`
>
>   Details:
>   The Atheros network card is detected by the ath9k driver when installed
> into a machine with x86_64 architecture. When the same card is installed
> into a miniPCIe-to-PCIe adapter, then plugged into a Raspberry Pi CM4 IO
> breakout board, the network adapter can be seen via lspci and lshw but is
> not seen by iw, iwconfig, or ifconfig.
>
>   lspci:
>   ubuntu@ubuntu:~$ sudo lspci -v
>   00:00.0 PCI bridge: Broadcom Inc. and subsidiaries Device 2711 (rev 20)
> (prog-if 00 [Normal decode])
> -       Flags: bus master, fast devsel, latency 0, IRQ 41
> -       Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
> -       I/O behind bridge: 00000000-00000fff [size=4K]
> -       Memory behind bridge: f8000000-f80fffff [size=1M]
> -       Prefetchable memory behind bridge: [disabled]
> -       Capabilities: [48] Power Management version 3
> -       Capabilities: [ac] Express Root Port (Slot-), MSI 00
> -       Capabilities: [100] Advanced Error Reporting
> -       Capabilities: [180] Vendor Specific Information: ID=0000 Rev=0
> Len=028 <?>
> -       Capabilities: [240] L1 PM Substates
> -       Kernel driver in use: pcieport
> +  Flags: bus master, fast devsel, latency 0, IRQ 41
> +  Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
> +  I/O behind bridge: 00000000-00000fff [size=4K]
> +  Memory behind bridge: f8000000-f80fffff [size=1M]
> +  Prefetchable memory behind bridge: [disabled]
> +  Capabilities: [48] Power Management version 3
> +  Capabilities: [ac] Express Root Port (Slot-), MSI 00
> +  Capabilities: [100] Advanced Error Reporting
> +  Capabilities: [180] Vendor Specific Information: ID=0000 Rev=0 Len=028
> <?>
> +  Capabilities: [240] L1 PM Substates
> +  Kernel driver in use: pcieport
>
>   01:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network
> Adapter (rev 01)
> -       Subsystem: Qualcomm Atheros AR93xx Wireless Network Adapter
> -       Flags: fast devsel, IRQ 255
> -       Memory at 600000000 (64-bit, non-prefetchable) [disabled]
> [size=128K]
> -       Expansion ROM at 600020000 [virtual] [disabled] [size=64K]
> -       Capabilities: [40] Power Management version 3
> -       Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
> -       Capabilities: [70] Express Endpoint, MSI 00
> -       Capabilities: [100] Advanced Error Reporting
> -       Capabilities: [140] Virtual Channel
> -       Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00
> +  Subsystem: Qualcomm Atheros AR93xx Wireless Network Adapter
> +  Flags: fast devsel, IRQ 255
> +  Memory at 600000000 (64-bit, non-prefetchable) [disabled] [size=128K]
> +  Expansion ROM at 600020000 [virtual] [disabled] [size=64K]
> +  Capabilities: [40] Power Management version 3
> +  Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
> +  Capabilities: [70] Express Endpoint, MSI 00
> +  Capabilities: [100] Advanced Error Reporting
> +  Capabilities: [140] Virtual Channel
> +  Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00
>
>   -----
>   lshw:
>   ubuntu@ubuntu:~$ sudo lshw -c net
> -   *-network UNCLAIMED
> -        description: Network controller
> -        product: AR93xx Wireless Network Adapter
> -        vendor: Qualcomm Atheros
> -        physical id: 0
> -        bus info: pci@0000:01:00.0
> -        version: 01
> -        width: 64 bits
> -        clock: 33MHz
> -        capabilities: pm msi pciexpress cap_list
> -        configuration: latency=0
> -        resources: memory:600000000-60001ffff memory:600020000-60002ffff
> -   *-network
> -        description: Ethernet interface
> -        physical id: 1
> -        logical name: eth0
> -        serial: dc:a6:32:f4:69:36
> -        size: 1Gbit/s
> -        capacity: 1Gbit/s
> -        capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt
> 100bt-fd 1000bt 1000bt-fd autonegotiation
> -        configuration: autonegotiation=on broadcast=yes driver=bcmgenet
> driverversion=v2.0 duplex=full ip=REDACTED link=yes multicast=yes port=MII
> speed=1Gbit/s
> +   *-network UNCLAIMED
> +        description: Network controller
> +        product: AR93xx Wireless Network Adapter
> +        vendor: Qualcomm Atheros
> +        physical id: 0
> +        bus info: pci@0000:01:00.0
> +        version: 01
> +        width: 64 bits
> +        clock: 33MHz
> +        capabilities: pm msi pciexpress cap_list
> +        configuration: latency=0
> +        resources: memory:600000000-60001ffff memory:600020000-60002ffff
> +   *-network
> +        description: Ethernet interface
> +        physical id: 1
> +        logical name: eth0
> +        serial: dc:a6:32:f4:69:36
> +        size: 1Gbit/s
> +        capacity: 1Gbit/s
> +        capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt
> 100bt-fd 1000bt 1000bt-fd autonegotiation
> +        configuration: autonegotiation=on broadcast=yes driver=bcmgenet
> driverversion=v2.0 duplex=full ip=REDACTED link=yes multicast=yes port=MII
> speed=1Gbit/s
>
>   -----
>   iw list/iwconfig:
>   ubuntu@ubuntu:~$ iw list
>   ubuntu@ubuntu:~$ iwconfig
>   lo        no wireless extensions.
>
>   eth0      no wireless extensions.
>
>   -----
>   ubuntu@ubuntu:~$ lsb_release -rd
>   Description:  Ubuntu 20.04.2 LTS
>   Release:      20.04
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 20.04
>   Package: linux-image-5.4.0-1034-raspi 5.4.0-1034.37
>   ProcVersionSignature: User Name 5.4.0-1034.37-raspi 5.4.101
>   Uname: Linux 5.4.0-1034-raspi aarch64
>   ApportVersion: 2.20.11-0ubuntu27.16
>   Architecture: arm64
>   CasperMD5CheckResult: skip
>   Date: Tue May  4 02:59:25 2021
>   ImageMediaBuild: 20210201.1
>   ProcEnviron:
> -  TERM=xterm-256color
> -  PATH=(custom, no user)
> -  XDG_RUNTIME_DIR=<set>
> -  LANG=C.UTF-8
> -  SHELL=/bin/bash
> +  TERM=xterm-256color
> +  PATH=(custom, no user)
> +  XDG_RUNTIME_DIR=<set>
> +  LANG=C.UTF-8
> +  SHELL=/bin/bash
>   SourcePackage: linux-raspi
>   UpgradeStatus: No upgrade log present (probably fresh install)
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1927037
>
> Title:
>   ath9k driver: miniPCIe Atheros AR93xx not recognized
>
> Status in linux-raspi package in Ubuntu:
>   New
> Status in linux-raspi source package in Focal:
>   New
> Status in linux-raspi source package in Groovy:
>   New
> Status in linux-raspi source package in Hirsute:
>   New
>
> Bug description:
>   [Impact]
>
>   PCIe cards based on ath9k chips are not recognized.
>
>   [Test Case]
>
>   Plug a ath9k based PCIe card into the PCIe slot of a CM4 IO board and:
>   $ ls /sys/class/net/wlan0
>   ls: cannot access '/sys/class/net/wlan0': No such file or directory
>
>   [Where Problems Could Occur]
>
>   Buggy driver could result in crashes.
>
>   [Original Description]
>
>   Expected behavior:
>   Network adapter should be visible via `iw list`, `iwconfig`, and
> `ifconfig`.
>
>   Actual behavior:
>   Network adapter is visible in `lspci` and `lshw`, but not in `iw list`,
> `iwconfig`, or `ifconfig`
>
>   Details:
>   The Atheros network card is detected by the ath9k driver when installed
> into a machine with x86_64 architecture. When the same card is installed
> into a miniPCIe-to-PCIe adapter, then plugged into a Raspberry Pi CM4 IO
> breakout board, the network adapter can be seen via lspci and lshw but is
> not seen by iw, iwconfig, or ifconfig.
>
>   lspci:
>   ubuntu@ubuntu:~$ sudo lspci -v
>   00:00.0 PCI bridge: Broadcom Inc. and subsidiaries Device 2711 (rev 20)
> (prog-if 00 [Normal decode])
>    Flags: bus master, fast devsel, latency 0, IRQ 41
>    Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
>    I/O behind bridge: 00000000-00000fff [size=4K]
>    Memory behind bridge: f8000000-f80fffff [size=1M]
>    Prefetchable memory behind bridge: [disabled]
>    Capabilities: [48] Power Management version 3
>    Capabilities: [ac] Express Root Port (Slot-), MSI 00
>    Capabilities: [100] Advanced Error Reporting
>    Capabilities: [180] Vendor Specific Information: ID=0000 Rev=0 Len=028
> <?>
>    Capabilities: [240] L1 PM Substates
>    Kernel driver in use: pcieport
>
>   01:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network
> Adapter (rev 01)
>    Subsystem: Qualcomm Atheros AR93xx Wireless Network Adapter
>    Flags: fast devsel, IRQ 255
>    Memory at 600000000 (64-bit, non-prefetchable) [disabled] [size=128K]
>    Expansion ROM at 600020000 [virtual] [disabled] [size=64K]
>    Capabilities: [40] Power Management version 3
>    Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
>    Capabilities: [70] Express Endpoint, MSI 00
>    Capabilities: [100] Advanced Error Reporting
>    Capabilities: [140] Virtual Channel
>    Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00
>
>   -----
>   lshw:
>   ubuntu@ubuntu:~$ sudo lshw -c net
>     *-network UNCLAIMED
>          description: Network controller
>          product: AR93xx Wireless Network Adapter
>          vendor: Qualcomm Atheros
>          physical id: 0
>          bus info: pci@0000:01:00.0
>          version: 01
>          width: 64 bits
>          clock: 33MHz
>          capabilities: pm msi pciexpress cap_list
>          configuration: latency=0
>          resources: memory:600000000-60001ffff memory:600020000-60002ffff
>     *-network
>          description: Ethernet interface
>          physical id: 1
>          logical name: eth0
>          serial: dc:a6:32:f4:69:36
>          size: 1Gbit/s
>          capacity: 1Gbit/s
>          capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt
> 100bt-fd 1000bt 1000bt-fd autonegotiation
>          configuration: autonegotiation=on broadcast=yes driver=bcmgenet
> driverversion=v2.0 duplex=full ip=REDACTED link=yes multicast=yes port=MII
> speed=1Gbit/s
>
>   -----
>   iw list/iwconfig:
>   ubuntu@ubuntu:~$ iw list
>   ubuntu@ubuntu:~$ iwconfig
>   lo        no wireless extensions.
>
>   eth0      no wireless extensions.
>
>   -----
>   ubuntu@ubuntu:~$ lsb_release -rd
>   Description:  Ubuntu 20.04.2 LTS
>   Release:      20.04
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 20.04
>   Package: linux-image-5.4.0-1034-raspi 5.4.0-1034.37
>   ProcVersionSignature: User Name 5.4.0-1034.37-raspi 5.4.101
>   Uname: Linux 5.4.0-1034-raspi aarch64
>   ApportVersion: 2.20.11-0ubuntu27.16
>   Architecture: arm64
>   CasperMD5CheckResult: skip
>   Date: Tue May  4 02:59:25 2021
>   ImageMediaBuild: 20210201.1
>   ProcEnviron:
>    TERM=xterm-256color
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=C.UTF-8
>    SHELL=/bin/bash
>   SourcePackage: linux-raspi
>   UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1927037/+subscriptions
>


-- 

*Ash Wilson* | Technical Director
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