I have an HPE server running Ubuntu 22.04 HWE kernels. The server has an LSI SAS 9212-4i4e controller. It has worked fine for years, up to and including 5.19 kernel series.
Since switching to the 6.2 series (currently 6.2.0-26), initialization of the SAS controller fails with:
kernel: mpt3sas version 43.100.00.00 loaded
kernel: mpt3sas 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
kernel: mpt3sas 0000:03:00.0: BAR 1: can't reserve [mem 0x805c0000-0x805c3fff 64bit]
kernel: mpt2sas_cm0: pci_request_selected_regions: failed
kernel: mpt2sas_cm0: failure at drivers/scsi/mpt3sas/mpt3sas_scsih.c:12348/_scsih_probe()!
Setting the pci=realloc=off kernel parameter as a workaround causes the SAS controller to work again:
kernel: mpt3sas version 43.100.00.00 loaded
kernel: mpt3sas 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
kernel: mpt2sas_cm0: 64 BIT PCI BUS DMA ADDRESSING SUPPORTED, total mem (20379788 kB)
kernel: mpt2sas_cm0: CurrentHostPageSize is 0: Setting default host page size to 4k
kernel: mpt2sas_cm0: MSI-X vectors supported: 1
kernel: mpt2sas_cm0: 0 1 1
kernel: mpt2sas_cm0: High IOPs queues : disabled
kernel: mpt2sas0-msix0: PCI-MSI-X enabled: IRQ 34
kernel: mpt2sas_cm0: iomem(0x0000000092c40000), mapped(0x000000002b3619b6), size(16384)
kernel: mpt2sas_cm0: ioport(0x0000000000002000), size(256)
kernel: mpt2sas_cm0: CurrentHostPageSize is 0: Setting default host page size to 4k
kernel: mpt2sas_cm0: scatter gather: sge_in_main_msg(1), sge_per_chain(9), sge_per_io(128), chains_per_io(15)
kernel: mpt2sas_cm0: request pool(0x000000003817f1fe) - dma(0x1218c0000): depth(1836), frame_size(128), pool_size(229 kB)
kernel: mpt2sas_cm0: sense pool(0x0000000085ef2f61) - dma(0x122000000): depth(1599), element_size(96), pool_size (149 kB)
kernel: mpt2sas_cm0: reply pool(0x00000000fce25422) - dma(0x122040000): depth(1900), frame_size(128), pool_size(237 kB)
kernel: mpt2sas_cm0: config page(0x00000000d30f2a68) - dma(0x121bb8000): size(512)
kernel: mpt2sas_cm0: Allocated physical memory: size(3652 kB)
kernel: mpt2sas_cm0: Current Controller Queue Depth(1596),Max Controller Queue Depth(1720)
kernel: mpt2sas_cm0: Scatter Gather Elements per IO(128)
kernel: mpt2sas_cm0: LSISAS2008: FWVersion(15.00.00.00), ChipRevision(0x03), BiosVersion(07.27.01.00)
kernel: mpt2sas_cm0: Protocol=(Initiator), Capabilities=(Raid,TLR,EEDP,Snapshot Buffer,Diag Trace Buffer,Task Set Full,NCQ)
kernel: mpt2sas_cm0: sending port enable !!
kernel: mpt2sas_cm0: hba_port entry: 0000000089564428, port: 255 is added to hba_port list
kernel: mpt2sas_cm0: host_add: handle(0x0001), sas_addr(0x500605b006509f50), phys(8)
kernel: mpt2sas_cm0: handle(0x9) sas_address(0x51402ec012084604) port_type(0x1)
kernel: mpt2sas_cm0: port enable: SUCCESS
Status changed to 'Confirmed' because the bug affects multiple users.