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* Question about allocating resources for a hotplug device
@ 2008-11-06 19:18 arvind vasudev
  0 siblings, 0 replies; only message in thread
From: arvind vasudev @ 2008-11-06 19:18 UTC (permalink / raw)
  To: linux-kernel, jbarnes

Increasing the scope to include more people.


--- On Wed, 11/5/08, arvind vasudev <> wrote:

> From: arvind vasudev <>
> Subject: Question about allocating resources for a hotplug device
> To:
> Date: Wednesday, November 5, 2008, 11:43 AM
> Hello,
> I am not sure if this is the right place to ask this
> question, so please let me know if there is another list
> that I should post this on.
> The question is that I am hotpluging a bridge in a slot,
> and plugging in a device behind the bridge. When I do this,
> I can see that the kernel enumerates the bridge and the
> device (assigns bus and device numbers to them), but it
> fails to allocate the memory resource that the new device is
> requesting for 1MB. After tracing the kernel code (version
> 2.6.23), I can see that call to pci_bus_assign_resources()
> fails. In the normal initialization sequence, it appears as
> though the BAR registers of a device have to be initialized
> before the call to pci_bus_assign_resources(), possibly by
> the BIOS.
> How should the BAR registers of the new device be
> initialized in the case of hotplug?
> Thanks,
> Arvind.
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2008-11-06 19:18 Question about allocating resources for a hotplug device arvind vasudev

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