Messages in this thread | | | From | John Garry <> | Subject | PCI MSI issue for maxcpus=1 | Date | Wed, 5 Jan 2022 11:23:47 +0000 |
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Hi Marc,
Just a heads up, I noticed that commit 4c457e8cb75e ("genirq/msi: Activate Multi-MSI early when MSI_FLAG_ACTIVATE_EARLY is set") is causing an issue on our arm64 D06 board where the SAS driver probe fails for maxcpus=1.
This seems different to issue [0].
So it's the driver call to pci_alloc_irq_vectors_affinity() which errors [1]:
[ 9.619070] hisi_sas_v3_hw: probe of 0000:74:02.0 failed with error -2
Some details: - device supports 32 MSI - min and max msi for that function is 17 and 32, respect. - affd pre and post are 16 and 0, respect.
I haven't checked to see what the issue is yet and I think that the pci_alloc_irq_vectors_affinity() usage is ok...
[0] https://lore.kernel.org/lkml/ea730f9b-c635-317d-c70d-4057590b1d1a@huawei.com/ [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c?h=v5.11#n2388
Cheers, John
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