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I wasted several hours bisecting the failure of the 6.12-rc? kernels to recognise USB hard disks connected to a Renesas USB 3.0 host controller.
The hardware affected was identified as:
lspci output:
02:00.0 USB controller: Renesas Electronics Corp. uPD720201 USB 3.0 Host Controller (rev 03)
lspci -n output:
02:00.0 0c03: 1912:0014 (rev 03)
This hardware had been supported in the Linux kernel for some years with the xhci_pci module enabled by CONFIG_USB_XHCI_PCI=m
Now with 6.12.0-rc? kernels it also requires the xhci_pci_renesas module enabled by CONFIG_USB_XHCI_PCI_RENESAS=m.
The problem is that CONFIG_USB_XHCI_PCI_RENESAS=m is not enabled unless manually selected.
Hope that this saves someone some time.
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