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pci switch not enumerating
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jpsollie
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Joined: 17 Aug 2013
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PostPosted: Sun Apr 22, 2018 10:38 am    Post subject: pci switch not enumerating Reply with quote

dmesg output
lspci output

I have a problem with a PCI switch:
the switch only recognises the first device, no matter which device it is.
PCI ports of the switch are mapped at 00:43:01-0f.
This is confirmed by echo 1> /sys/bus/pci/devices/00:43:01/remove, which removes the device at the pci address 00:4f:00 (seems the port is closed)
but why are other ports not scanned? there must be 2 other devices on the switch which are impossible to find (no, echo 1 > /sys/bus/pci/rescan doesn't work)
anyone who has a hint?

thanks
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jpsollie
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Joined: 17 Aug 2013
Posts: 54

PostPosted: Sun Apr 22, 2018 4:22 pm    Post subject: Reply with quote

i've gotten somewhere I think. Don't think of it as a resolution, more like a workaround:
- while the pc is running, Unplug (yes, really unplug) the PCIe device from the switch
- attach it to one of the ports with a lower id than the one currently mapped.
- poweroff
- boot
... so I've 2 out of 3 devices working. Now the 3rd device and we're ready to go!

*edit: the trick also worked with the 3rd device. weird, but working! now I'd like to find a real solution instead of this workaround
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