On Tue, 22 Jan 2019 at 14:52, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote: > > Hi Heiner, > > On Fri, Jan 18, 2019 at 9:58 PM Heiner Kallweit <hkallweit1@xxxxxxxxx> wrote: > > On 18.01.2019 09:48, Krzysztof Kozlowski wrote: > > > On Fri, 18 Jan 2019 at 09:39, Krzysztof Kozlowski <krzk@xxxxxxxxxx> wrote: > > >> On today's next (next-20190118) my Colibri VF50 board fails to boot up > > >> from network (DHCP, NFSv4 root). Looks like missing network adapter. > > >> Expected: > > >> [ 3.041773] Micrel KSZ8041 400d1000.ethernet-1:00: attached PHY driver > > >> [Micrel KSZ8041] (mii_bus:phy_addr=400d1000.ethernet-1:00, irq=POLL) > > >> > > >> Result: > > >> [ 15.614964] Root-NFS: no NFS server address > > >> [ 15.619353] VFS: Unable to mount root fs via NFS, trying floppy. > > >> [ 15.626762] VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6 > > >> [ 15.634252] Please append a correct "root=" boot option; here are the > > >> available partitions: > > >> [ 15.642791] 0100 16384 ram0 > > >> [ 15.642804] (driver?) > > >> [ 15.649076] Kernel panic - not syncing: VFS: Unable to mount root fs > > >> on unknown-block(2,0) > > >> [ 15.657423] ---[ end Kernel panic - not syncing: VFS: Unable to mount > > >> root fs on unknown-block(2,0) ]--- > > >> > > >> Bisect pointed to: > > >> net: phy: check return code when requesting PHY driver module > > > > > > I see now in the logs: > > > [ 2.436822] mdio_bus 400d1000.ethernet-1:00: error -2 loading PHY > > > driver module for ID 0x00221513 > > > which is kind of misleading. There is no initramfs so there is no > > > usermod library at this point. It is not needed. This seems to break > > > all DHCP/NFS root boots without initrd/initramfs. > > > > > Thanks for the report. Could you please provide your kernel config > > and the syslog of a boot before or w/o the patch in question? > > > > If you boot via nfs then I'd expect that the PHY driver is built-in and > > not a module. Therefore it's not fully clear to me yet why > > request_module() returns -ENOENT. > > I'm seeing the same booting nfsroot on several Renesas boards. > E.g. on r8a7791/koelsch: > > mdio_bus ee700000.ethernet-ffffffff:01: error -2 loading PHY > driver module for ID 0x00221537 > sh-eth ee700000.ethernet: MDIO init failed: -2 > Hi Geert, There is a follow up patch: https://www.spinics.net/lists/netdev/msg545573.html Best regards, Krzysztof
