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Re: pci_alloc_irq_vectors fails ENOSPC for XPS 13 9310

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On 02/11/2020 21.57, Bjorn Helgaas wrote:
>>>
>>> CONFIG_IRQ_REMAP did not do the trick. I noticed that the Wi-Fi card
>>> is behind a PCI bridge which is also disabled, could this be a
>>> problem?

Just to provide another case, I have the same issue with this driver.

CONFIG_IRQ_REMAP=y and doesn't have any effect.

I'm unsure if the issue could be my system (Atom / Intel J1900) or the
that I'm using a slightly different card. Is there anyway to tell from the
lspci output? Here is what I guess is most relevant:

00:1c.2 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 3 (rev 0e) (prog-if 00 [Normal decode])
        Memory behind bridge: d0000000-d0ffffff [size=16M]
        Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
        Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
                Address: fee08004  Data: 4021

03:00.0 Unassigned class [ff00]: Qualcomm Device 1101
        Subsystem: Qualcomm Device 0108
        Region 0: Memory at d0000000 (64-bit, non-prefetchable) [size=16M]
        Capabilities: [50] MSI: Enable+ Count=1/32 Maskable+ 64bit-
                Address: fee01004  Data: 40ef
                Masking: ffffffff  Pending: 00000000
        Capabilities: [70] Express (v2) Endpoint, MSI 00

Thanks,
Devin



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