On Thu, Feb 11, 2021 at 2:00 PM Geert Uytterhoeven [off-list ref] wrote:

On Fri, Feb 5, 2021 at 11:26 PM Saravana Kannan [off-list ref] wrote:

quoted

There are a lot of devices/drivers where they never have a struct device
created for them or the driver initializes the hardware without ever
binding to the struct device.

This series is intended to avoid any boot regressions due to such
devices/drivers when fw_devlink=on and also address the handling of
optional suppliers.

      - Some devices are reprobed, despite their drivers returning
        a real error code, and not -EPROBE_DEFER:

            renesas_wdt e6020000.watchdog: Watchdog blacklisted on r8a7791 ES1.*
            (rwdt_probe() returns -ENODEV)

            sh-pfc e6060000.pinctrl: pin GP_7_23 already requested by
ee090000.pci; cannot claim for e6590000.usb
            sh-pfc e6060000.pinctrl: pin-247 (e6590000.usb) status -22
            sh-pfc e6060000.pinctrl: could not request pin 247
(GP_7_23) from group usb0  on device sh-pfc
            renesas_usbhs e6590000.usb: Error applying setting,
reverse things back
            renesas_usbhs: probe of e6590000.usb failed with error -22

            rcar-pcie fe000000.pcie: host bridge /soc/pcie@fe000000 ranges:
            rcar-pcie fe000000.pcie:       IO
0x00fe100000..0x00fe1fffff -> 0x0000000000
            rcar-pcie fe000000.pcie:      MEM
0x00fe200000..0x00fe3fffff -> 0x00fe200000
            rcar-pcie fe000000.pcie:      MEM
0x0030000000..0x0037ffffff -> 0x0030000000
            rcar-pcie fe000000.pcie:      MEM
0x0038000000..0x003fffffff -> 0x0038000000
            rcar-pcie fe000000.pcie:   IB MEM
0x0040000000..0x00bfffffff -> 0x0040000000
            rcar-pcie fe000000.pcie:   IB MEM
0x0200000000..0x02ffffffff -> 0x0200000000
            rcar-pcie fe000000.pcie: PCIe link down
            (rcar_pcie_probe() returns -ENODEV)

            xhci-hcd ee000000.usb: xHCI Host Controller
            xhci-hcd ee000000.usb: new USB bus registered, assigned bus number 7
            xhci-hcd ee000000.usb: Direct firmware load for
r8a779x_usb3_v3.dlmem failed with error -2
            xhci-hcd ee000000.usb: can't setup: -2
            xhci-hcd ee000000.usb: USB bus 7 deregistered
            xhci-hcd: probe of ee000000.usb failed with error -2

Consumers are added to the deferred probe pending list before
they are probed, but not removed on probe failure.
Patch sent
"[PATCH] driver core: Fix double failed probing with fw_devlink=on"
https://lore.kernel.org/linux-renesas-soc/20210215111619.2385030-1-geert+renesas@glider.be/ (local)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds