For test I've just updated OpenBSD from 6.2amd64 to 6.3amd64 on Intel
based machine (shortened dmesg is listed below) and there is no 'athn0:
could not load firmware' error appears after upgrade. On Intel's
platform AR9271 works as expected.

On AMD based machine 'athn0: could not load firmware' error is
permanent. AR9271 does not work completely on AMD GX-420CA SOC. Full
dmesg of AMD machine fully listed in my previous message.

OpenBSD 6.3 (GENERIC.MP) #107: Sat Mar 24 14:21:59 MDT 2018
     dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 8451125248 (8059MB)
avail mem = 8192278528 (7812MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xdae9c000 (64 entries)
bios0: vendor LENOVO version "8DET72WW (1.42 )" date 02/18/2016
bios0: LENOVO 5491C51
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP SLIC SSDT SSDT SSDT HPET APIC MCFG ECDT ASF!
TCPA SSDT SSDT DMAR UEFI UEFI UEFI
acpi0: wakeup devices LID_(S3) SLPB(S3) IGBE(S4) EXP4(S4) EXP7(S4)
EHC1(S3) EHC2(S3) HDEF(S4)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 14318179 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz, 2791.33 MHz
cpu0:
...

On 4/5/2018 6:46 PM, Denis wrote:
> Stefan,
> 
> You're right the machine with installed 6.3 is completely different than
> 6.2 currently running.
> 
> Here is dmesg of 6.3 machine:
> 
> OpenBSD 6.3 (GENERIC.MP) #107: Sat Mar 24 14:21:59 MDT 2018
>     dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
> real mem = 7964327936 (7595MB)
> avail mem = 7715876864 (7358MB)
> mpath0 at root
> scsibus0 at mpath0: 256 targets
> mainbus0 at root
> bios0 at mainbus0: SMBIOS rev. 2.7 @ 0xe0840 (38 entries)
> bios0: vendor Phoenix Technologies Ltd. version "SBCFP4_3.0.0.312_11
> X64" date 09/21/2014
> bios0: CompuLab fit-PC4
> acpi0 at bios0: rev 2
> acpi0: sleep states S0 S3 S4 S5
> acpi0: tables DSDT FACP HPET APIC MCFG FPDT UEFI POAT BATB SSDT SSDT UEFI
> acpi0: wakeup devices GPP0(S4) GPP1(S4) GPP2(S4) GPP3(S4) GFX_(S4)
> XHC0(S4) OHC1(S4) EHC1(S4) OHC2(S4) EHC2(S4) SBAZ(S4) UAR1(S3)
> acpitimer0 at acpi0: 3579545 Hz, 32 bits
> acpihpet0 at acpi0: 14318180 Hz
> acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
> cpu0 at mainbus0: apid 0 (boot processor)
> cpu0: AMD GX-420CA SOC with Radeon(tm) HD Graphics, 1996.49 MHz
> cpu0:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXS
> \
> R,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F
> \
> 16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,DBKP,PCTRL3,ITSC,BMI1
> 
> cpu0: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 2MB
> 64b/line 16-way L2 cache
> cpu0: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative
> cpu0: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative
> acpihpet0: recalibrated TSC frequency 1996262805 Hz
> cpu0: smt 0, core 0, package 0
> mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
> cpu0: apic clock running at 99MHz
> cpu0: mwait min=64, max=64, IBE
> cpu1 at mainbus0: apid 1 (application processor)
> cpu1: AMD GX-420CA SOC with Radeon(tm) HD Graphics, 1996.26 MHz
> cpu1:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXS
> \
> R,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F
> \
> 16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,DBKP,PCTRL3,ITSC,BMI1
> 
> cpu1: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 2MB
> 64b/line 16-way L2 cache
> cpu1: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative
> cpu1: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative
> cpu1: smt 0, core 1, package 0
> cpu2 at mainbus0: apid 2 (application processor)
> cpu2: AMD GX-420CA SOC with Radeon(tm) HD Graphics, 1996.26 MHz
> cpu2:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXS
> \
> R,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F
> \
> 16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,DBKP,PCTRL3,ITSC,BMI1
> 
> cpu2: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 2MB
> 64b/line 16-way L2 cache
> cpu2: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative
> cpu2: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative
> cpu2: smt 0, core 2, package 0
> cpu3 at mainbus0: apid 3 (application processor)
> cpu3: AMD GX-420CA SOC with Radeon(tm) HD Graphics, 1996.26 MHz
> cpu3:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXS
> \
> R,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F
> \
> 16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,DBKP,PCTRL3,ITSC,BMI1
> 
> cpu3: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 2MB
> 64b/line 16-way L2 cache
> cpu3: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative
> cpu3: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative
> cpu3: smt 0, core 3, package 0
> ioapic0 at mainbus0: apid 4 pa 0xfec00000, version 21, 24 pins
> , remapped to apid 4
> ioapic1 at mainbus0: apid 5 pa 0xfec01000, version 21, 32 pins
> , remapped to apid 5
> acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63
> acpiprt0 at acpi0: bus 0 (PCI0)
> acpiprt1 at acpi0: bus 2 (GPP0)
> acpiprt2 at acpi0: bus -1 (GPP1)
> acpiprt3 at acpi0: bus 4 (GPP2)
> acpiprt4 at acpi0: bus 5 (GPP3)
> acpiprt5 at acpi0: bus 1 (GFX_)
> acpicpu0 at acpi0: C2(0@400 io@0x841), C1(@1 halt!), PSS
> acpicpu1 at acpi0: C2(0@400 io@0x841), C1(@1 halt!), PSS
> acpicpu2 at acpi0: C2(0@400 io@0x841), C1(@1 halt!), PSS
> acpicpu3 at acpi0: C2(0@400 io@0x841), C1(@1 halt!), PSS
> acpibtn0 at acpi0: PWRB
> "PNP0A05" at acpi0 not configured
> acpivideo0 at acpi0: VGA_
> cpu0: 1996 MHz: speeds: 2000 1800 1600 1200 1000 800 MHz
> pci0 at mainbus0 bus 0
> pchb0 at pci0 dev 0 function 0 "AMD AMD64 16h Host" rev 0x00
> vga1 at pci0 dev 1 function 0 vendor "ATI", unknown product 0x9831 rev 0x00
> wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
> wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
> azalia0 at pci0 dev 1 function 1 "ATI Radeon HD Audio" rev 0x00: msi
> azalia0: no supported codecs
> pchb1 at pci0 dev 2 function 0 vendor "AMD", unknown product 0x1538 rev 0x00
> ppb0 at pci0 dev 2 function 1 "AMD AMD64 16h PCIE" rev 0x00: msi
> pci1 at ppb0 bus 1
> ppb1 at pci0 dev 2 function 2 "AMD AMD64 16h PCIE" rev 0x00: msi
> pci2 at ppb1 bus 2
> athn0 at pci2 dev 0 function 0 "Atheros AR5418" rev 0x01: apic 5 int 4
> athn0: MAC AR5418 rev 2, RF AR5133 (2T3R), ROM rev 5, address
> xx:xx:xx:xx:xx:xx
> ppb2 at pci0 dev 2 function 4 "AMD AMD64 16h PCIE" rev 0x00: msi
> pci3 at ppb2 bus 4
> em0 at pci3 dev 0 function 0 "Intel I211" rev 0x03: msi, address
> xx:xx:xx:xx:xx:xx
> ppb3 at pci0 dev 2 function 5 "AMD AMD64 16h PCIE" rev 0x00: msi
> pci4 at ppb3 bus 5
> em1 at pci4 dev 0 function 0 "Intel I211" rev 0x03: msi, address
> xx:xx:xx:xx:xx:xx
> xhci0 at pci0 dev 16 function 0 "AMD Bolton xHCI" rev 0x01: msi
> usb0 at xhci0: USB revision 3.0
> uhub0 at usb0 configuration 1 interface 0 "AMD xHCI root hub" rev
> 3.00/1.00 addr 1
> ahci0 at pci0 dev 17 function 0 "AMD Hudson-2 SATA" rev 0x40: msi, AHCI 1.3
> ahci0: port 0: 6.0Gb/s
> scsibus1 at ahci0: 32 targets
> sd0 at scsibus1 targ 0 lun 0: <ATA, ST500, 0001> SCSI3 0/direct fixed
> naa.5000c500ac5b7fb7
> sd0: 476940MB, 512 bytes/sector, 976773168 sectors
> ohci0 at pci0 dev 18 function 0 "AMD Hudson-2 USB" rev 0x39: apic 4 int
> 18, version 1.0, legacy support
> ehci0 at pci0 dev 18 function 2 "AMD Hudson-2 USB2" rev 0x39: apic 4 int 17
> usb1 at ehci0: USB revision 2.0
> uhub1 at usb1 configuration 1 interface 0 "AMD EHCI root hub" rev
> 2.00/1.00 addr 1
> ohci1 at pci0 dev 19 function 0 "AMD Hudson-2 USB" rev 0x39: apic 4 int
> 18, version 1.0, legacy support
> ehci1 at pci0 dev 19 function 2 "AMD Hudson-2 USB2" rev 0x39: apic 4 int 17
> usb2 at ehci1: USB revision 2.0
> uhub2 at usb2 configuration 1 interface 0 "AMD EHCI root hub" rev
> 2.00/1.00 addr 1
> piixpm0 at pci0 dev 20 function 0 "AMD Hudson-2 SMBus" rev 0x3a: polling
> iic0 at piixpm0
> spdmem0 at iic0 addr 0x51: 8GB DDR3 SDRAM PC3-12800 SO-DIMM
> azalia1 at pci0 dev 20 function 2 "AMD Hudson-2 HD Audio" rev 0x02: apic
> 4 int 16
> azalia1: codecs: Realtek ALC888
> audio0 at azalia1
> pcib0 at pci0 dev 20 function 3 "AMD Hudson-2 LPC" rev 0x11
> sdhc0 at pci0 dev 20 function 7 "AMD Bolton SD/MMC" rev 0x01: apic 4 int 16
> sdhc0: SDHC 2.0, 50 MHz base clock
> sdmmc0 at sdhc0: 4-bit, sd high-speed, mmc high-speed, dma
> pchb2 at pci0 dev 24 function 0 "AMD AMD64 16h Link Cfg" rev 0x00
> pchb3 at pci0 dev 24 function 1 "AMD AMD64 16h Address Map" rev 0x00
> pchb4 at pci0 dev 24 function 2 "AMD AMD64 16h DRAM Cfg" rev 0x00
> km0 at pci0 dev 24 function 3 "AMD AMD64 16h Misc Cfg" rev 0x00
> pchb5 at pci0 dev 24 function 4 "AMD AMD64 16h CPU Power" rev 0x00
> pchb6 at pci0 dev 24 function 5 vendor "AMD", unknown product 0x1535 rev
> 0x00
> usb3 at ohci0: USB revision 1.0
> uhub3 at usb3 configuration 1 interface 0 "AMD OHCI root hub" rev
> 1.00/1.00 addr 1
> usb4 at ohci1: USB revision 1.0
> uhub4 at usb4 configuration 1 interface 0 "AMD OHCI root hub" rev
> 1.00/1.00 addr 1
> isa0 at pcib0
> isadma0 at isa0
> com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
> pckbc0 at isa0 port 0x60/5 irq 1 irq 12
> pcppi0 at isa0 port 0x61
> spkr0 at pcppi0
> vmm0 at mainbus0: SVM/RVI
> sdmmc0: can't enable card
> axen0 at uhub0 port 1 configuration 1 interface 0 "ASIX Elec. Corp.
> AX88179" rev 3.00/1.00 addr 2
> axen0: AX88179, address xx:xx:xx:xx:xx:xx
> rgephy0 at axen0 phy 3: RTL8169S/8110S/8211 PHY, rev. 5
> uhidev0 at uhub3 port 1 configuration 1 interface 0 "Dell Dell Smart
> Card Reader Keyboard" rev 2.00/1.00 addr 2
> uhidev0: iclass 3/1
> ukbd0 at uhidev0: 8 variable keys, 6 key codes
> wskbd0 at ukbd0: console keyboard, using wsdisplay0
> ugen0 at uhub3 port 1 configuration 1 "Dell Dell Smart Card Reader
> Keyboard" rev 2.00/1.00 addr 2
> vscsi0 at root
> scsibus2 at vscsi0: 256 targets
> softraid0 at root
> scsibus3 at softraid0: 256 targets
> softraid0: sd1 was not shutdown properly
> sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 006> SCSI2 0/direct fixed
> sd1: 476937MB, 512 bytes/sector, 976767473 sectors
> root on sd1a (9990ff6713f15d12.a) swap on sd1b dump on sd1b
> WARNING: / was not properly unmounted
> 
> -----------------------------------------
> 
> OpenBSD 6.2 (GENERIC.MP) #1: Thu Jan 18 11:09:28 UTC 2018
>     r...@machine.net:/usr/src/sys/arch/amd64/compile/GENERIC.MP
> real mem = 8451125248 (8059MB)
> avail mem = 8192278528 (7812MB)
> mpath0 at root
> scsibus0 at mpath0: 256 targets
> mainbus0 at root
> bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xdae9c000 (64 entries)
> bios0: vendor LENOVO version "8DET72WW (1.42 )" date 02/18/2016
> bios0: LENOVO 5491C51
> acpi0 at bios0: rev 2
> acpi0: sleep states S0 S3 S4 S5
> acpi0: tables DSDT FACP SLIC SSDT SSDT SSDT HPET APIC MCFG ECDT ASF!
> TCPA SSDT SSDT DMAR UEFI UEFI UEFI
> acpi0: wakeup devices LID_(S3) SLPB(S3) IGBE(S4) EXP4(S4) EXP7(S4)
> EHC1(S3) EHC2(S3) HDEF(S4)
> acpitimer0 at acpi0: 3579545 Hz, 24 bits
> acpihpet0 at acpi0: 14318179 Hz
> acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
> cpu0 at mainbus0: apid 0 (boot processor)
> cpu0: Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz, 2791.33 MHz
> cpu0:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI
> \
> ,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3
> \
> ,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,SENSOR,ARAT
> 
> cpu0: 256KB 64b/line 8-way L2 cache
> cpu0: TSC frequency 2791332320 Hz
> cpu0: smt 0, core 0, package 0
> mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
> cpu0: apic clock running at 99MHz
> cpu0: mwait min=64, max=64, C-substates=0.2.1.1.2, IBE
> cpu1 at mainbus0: apid 1 (application processor)
> cpu1: Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz, 2790.93 MHz
> cpu1:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI
> \
> ,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3
> \
> ,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,SENSOR,ARAT
> 
> cpu1: 256KB 64b/line 8-way L2 cache
> cpu1: smt 1, core 0, package 0
> cpu2 at mainbus0: apid 2 (application processor)
> cpu2: Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz, 2790.93 MHz
> cpu2:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI
> \
> ,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3
> \
> ,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,SENSOR,ARAT
> 
> cpu2: 256KB 64b/line 8-way L2 cache
> cpu2: smt 0, core 1, package 0
> cpu3 at mainbus0: apid 3 (application processor)
> cpu3: Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz, 2790.93 MHz
> cpu3:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI
> \
> ,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3
> \
> ,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,SENSOR,ARAT
> 
> cpu3: 256KB 64b/line 8-way L2 cache
> cpu3: smt 1, core 1, package 0
> ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins
> acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63
> acpiec0 at acpi0
> acpiprt0 at acpi0: bus 0 (PCI0)
> acpiprt1 at acpi0: bus -1 (PEG_)
> acpiprt2 at acpi0: bus 2 (EXP1)
> acpiprt3 at acpi0: bus 3 (EXP2)
> acpiprt4 at acpi0: bus 5 (EXP4)
> acpiprt5 at acpi0: bus 13 (EXP5)
> acpiprt6 at acpi0: bus 14 (EXP7)
> acpicpu0 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS
> acpicpu1 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS
> acpicpu2 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS
> acpicpu3 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS
> acpipwrres0 at acpi0: PUBS, resource for EHC1, EHC2
> acpitz0 at acpi0: critical temperature is 99 degC
> acpibtn0 at acpi0: LID_
> acpibtn1 at acpi0: SLPB
> "LEN0020" at acpi0 not configured
> acpibat0 at acpi0: BAT0 model "45N1172" serial 14231 type LION oem "SANYO"
> acpiac0 at acpi0: AC unit online
> acpithinkpad0 at acpi0
> "IBM0079" at acpi0 not configured
> "PNP0C14" at acpi0 not configured
> "PNP0C14" at acpi0 not configured
> acpidock0 at acpi0: GDCK docked (15)
> acpivideo0 at acpi0: VID_
> acpivout at acpivideo0 not configured
> acpivideo1 at acpi0: VID_
> cpu0: Enhanced SpeedStep 2791 MHz: speeds: 2801, 2800, 2600, 2400, 2200,
> 2000, 1800, 1600, 1400, 1200, 1000, 800 MHz
> pci0 at mainbus0 bus 0
> pchb0 at pci0 dev 0 function 0 "Intel Core 2G Host" rev 0x09
> inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 3000" rev 0x09
> drm0 at inteldrm0
> inteldrm0: msi
> inteldrm0: 1366x768, 32bpp
> wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation)
> wsdisplay0: screen 1-5 added (std, vt100 emulation)
> "Intel 6 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured
> em0 at pci0 dev 25 function 0 "Intel 82579LM" rev 0x04: msi, address
> f0:de:f1:d1:9d:19
> ehci0 at pci0 dev 26 function 0 "Intel 6 Series USB" rev 0x04: apic 2 int 16
> usb0 at ehci0: USB revision 2.0
> uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev
> 2.00/1.00 addr 1
> azalia0 at pci0 dev 27 function 0 "Intel 6 Series HD Audio" rev 0x04: msi
> azalia0: codecs: Conexant CX20590, Intel/0x2805, using Conexant CX20590
> audio0 at azalia0
> ppb0 at pci0 dev 28 function 0 "Intel 6 Series PCIE" rev 0xb4: msi
> pci1 at ppb0 bus 2
> ppb1 at pci0 dev 28 function 1 "Intel 6 Series PCIE" rev 0xb4: msi
> pci2 at ppb1 bus 3
> athn0 at pci2 dev 0 function 0 "Atheros AR9281" rev 0x01: apic 2 int 17
> athn0: AR9280 rev 2 (2T2R), ROM rev 22, address 70:f1:a1:7f:ca:63
> ppb2 at pci0 dev 28 function 3 "Intel 6 Series PCIE" rev 0xb4: msi
> pci3 at ppb2 bus 5
> ppb3 at pci0 dev 28 function 4 "Intel 6 Series PCIE" rev 0xb4: msi
> pci4 at ppb3 bus 13
> sdhc0 at pci4 dev 0 function 0 "Ricoh 5U822 SD/MMC" rev 0x07: apic 2 int 16
> sdhc0: SDHC 3.0, 50 MHz base clock
> sdmmc0 at sdhc0: 4-bit, sd high-speed, mmc high-speed, dma
> ppb4 at pci0 dev 28 function 6 "Intel 6 Series PCIE" rev 0xb4: msi
> pci5 at ppb4 bus 14
> xhci0 at pci5 dev 0 function 0 "NEC xHCI" rev 0x04: msi
> usb1 at xhci0: USB revision 3.0
> uhub1 at usb1 configuration 1 interface 0 "NEC xHCI root hub" rev
> 3.00/1.00 addr 1
> ehci1 at pci0 dev 29 function 0 "Intel 6 Series USB" rev 0x04: apic 2 int 23
> usb2 at ehci1: USB revision 2.0
> uhub2 at usb2 configuration 1 interface 0 "Intel EHCI root hub" rev
> 2.00/1.00 addr 1
> pcib0 at pci0 dev 31 function 0 "Intel QM67 LPC" rev 0x04
> ahci0 at pci0 dev 31 function 2 "Intel 6 Series AHCI" rev 0x04: msi,
> AHCI 1.3
> ahci0: port 0: 6.0Gb/s
> scsibus1 at ahci0: 32 targets
> sd0 at scsibus1 targ 0 lun 0: <ATA, ST750LX003, 0002> SCSI3 0/direct fixed
> sd0: 698940MB, 512 bytes/sector, 1356773168 sectors
> ichiic0 at pci0 dev 31 function 3 "Intel 6 Series SMBus" rev 0x04: apic
> 2 int 18
> iic0 at ichiic0
> spdmem0 at iic0 addr 0x50: 4GB DDR3 SDRAM PC3-10600 SO-DIMM
> spdmem1 at iic0 addr 0x51: 4GB DDR3 SDRAM PC3-10600 SO-DIMM
> isa0 at pcib0
> isadma0 at isa0
> pckbc0 at isa0 port 0x60/5 irq 1 irq 12
> pckbd0 at pckbc0 (kbd slot)
> wskbd0 at pckbd0: console keyboard, using wsdisplay0
> pms0 at pckbc0 (aux slot)
> wsmouse0 at pms0 mux 0
> wsmouse1 at pms0 mux 0
> pms0: Synaptics clickpad, firmware 8.1, 0x1e2b1 0x940300
> pcppi0 at isa0 port 0x61
> spkr0 at pcppi0
> aps0 at isa0 port 0x1600/31
> vmm0 at mainbus0: VMX/EPT
> uhub3 at uhub0 port 1 configuration 1 interface 0 "Intel Rate Matching
> Hub" rev 2.00/0.00 addr 2
> uhub4 at uhub3 port 1 configuration 1 interface 0 "Standard
> Microsystems" rev 2.00/0.00 addr 3
> run0 at uhub4 port 2 configuration 1 interface 0 "Ralink 3070" rev
> 2.00/1.01 addr 4
> run0: MAC/BBP RT3070 (rev 0x0201), RF RT3020 (MIMO 1T1R), address
> xx:xx:xx:xx:xx:xx
> uhub5 at uhub2 port 1 configuration 1 interface 0 "Intel Rate Matching
> Hub" rev 2.00/0.00 addr 2
> ugen0 at uhub5 port 6 "OMNIKEY" rev 2.00/2.03 addr 3
> vscsi0 at root
> scsibus2 at vscsi0: 256 targets
> softraid0 at root
> scsibus3 at softraid0: 256 targets
> softraid0: sd1 was not shutdown properly
> sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 006> SCSI2 0/direct fixed
> 
> ----------------------
> 
> Stefan, I can't test 6.3 on the machine which has 6.2 currently
> installed. Will do it a bit later (hope next week).
> 
> Thank you for attention to the problem present.
> 
> On 4/5/2018 6:09 PM, Stefan Sperling wrote:
>> On Thu, Apr 05, 2018 at 05:30:25PM +0300, Denis wrote:
>>> 1. AR9271 USB stick has been connected to OpenBSD 6.3 amd64
>>> 2. # fw_update
>>> 3. # ls /etc/firmware | grep athn
>>> athn-ar7010
>>> athn-ar7010-11
>>> athn-ar9271
>>> athn-license
>>> athn-open-ar7010
>>> athn-open-ar9271
>>> athn-open-license
>>>
>>> After reconnecting AR9271
>>> athn0: could not load firmware
>>
>> I don't know why the firmware doesn't load for you.
>> It all works fine for me, with both AR9271 devices and AR7010 devices.
>>
>> There is a known issue which looks like this device does not power up
>> properly on some machines, and in some configurations, for example
>> when it is plugged behind a USB 2.0 hub.
>> This results in a failure to load the firmware but it the underlying
>> issue is a different problem which nobody has figured out yet.
>> It could be a bug in our USB stack.
>>
>> However, this is inconsistent with your observation that it worked
>> in 6.2. It sounds like nothing else changed?
>>  
>>> When I remove athn-open-* firmware files from /etc/firmware
>>> athn0: failed loadfirmware of file athn-open-ar9271 (error 2)
>>> athn0: could not load firmware
>>>
>>> In OpenBSD 6.2 amd64 /etc/firmware contains only athn-ar7010,
>>> athn-ar7010-11, and ar9271. The USB stick works with it.
>>
>> Is this 6.2 install on the same machine, or on a different machine?
>> If it's a different machine, could you try 6.3 on the same machine
>> where you tested 6.2?
>>
>>> I think it could be working again if I load non athn-open-* versions of
>>> firmware provided.
>>>
>>> My question is how to load non open version (athn-ar9271) of the athn
>>> firmware to have AR9271 working?
>>
>> You cannot.
>> The driver in 6.3 does not support the old closed source firmware
>> anymore. It only supports the open firmware.
>>
>> It's unfortunate that this change broke it for you, but I cannot
>> explain why. When this change was made about 2 months ago I did
>> not get any negative reports.
>> See https://marc.info/?l=openbsd-tech&m=151769894925027&w=2
>>
>>> athn0: failed error message has a typo 'loadfirmware' without a space.
>>
>> That's intentional. It refers to the function loadfirmware(9):
>> http://man.openbsd.org/loadfirmware
>>
> 

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