Bug#1107142: linux-image-6.12.27-amd64: mpt3sas LSI SAS2008 [1000:0072] probe failure - BAR 1 reservation error

[lord2y <lord2y@pm.me>]

Hello,

On Monday, June 2nd, 2025 at 9:11 AM, goose <last.ocean8435@goose.ws> wrote:
>
> Package: src:linux
> Version: 6.12.27-1
> Severity: important
> Tags: upstream
> X-Debbugs-Cc: debian-amd64@lists.debian.org
> User: debian-amd64@lists.debian.org
> Usertags: amd64
>
> After upgrading from Debian Bookworm to Trixie, and subsequently to kernel linux-image-6.12.27-amd64 (version 6.12.27-1), my LSI SAS2008 HBA is no longer being initialized correctly, preventing access to the attached SAS drives. This appears to be a regression, as the LSI SAS2008 HBA and attached SAS drives work perfectly under kernel 6.1.0-37-amd64. The SAS drives connected to the LSI HBA are not detected by the system (do not appear in lsblk). The mpt3sas driver loads but fails to initialize the card. lspci -nnk for device 04:00.0 shows Kernel modules: mpt3sas but does not show a "Kernel driver in use" line when the failure occurs.
>
> What I believe are the key error messages in dmesg are:
>
> mpt3sas version 48.100.00.00 loaded
> mpt3sas 0000:04:00.0: can't disable ASPM; OS doesn't have ASPM control
> mpt3sas 0000:04:00.0: BAR 1: can't reserve [mem 0xWWWWWWWW-0xYYYYYYYY 64bit] <-- Please replace with the exact memory addresses from your latest dmesg on 6.12.27
> mpt2sas_cm0: pci_request_selected_regions: failed
> mpt2sas_cm0: failure at drivers/scsi/mpt3sas/mpt3sas_scsih.c:12319/_scsih_probe()!
>
> Adding the kernel boot parameter pci=nocrs did not resolve the BAR 1 reservation error or the probe failure for mpt3sas on kernel 6.12.27-amd64. I am currently booting in to kernel 6.1.0-37-amd64 as a workaround.

Can you try booting 6.12.27-amd64 passing the kernel boot option pci=realloc=off?

Hope this helps.

Best,
A.