Re: [PATCH v2] PCI: dwc: endpoint: Fix advertised resizable BAR size

["Krzysztof Wilczyński" <kw@linux.com>]

Hello,

> The commit message in commit fc9a77040b04 ("PCI: designware-ep: Configure
> Resizable BAR cap to advertise the smallest size") claims that it modifies
> the Resizable BAR capability to only advertise support for 1 MB size BARs.
> 
> However, the commit writes all zeroes to PCI_REBAR_CAP (the register which
> contains the possible BAR sizes that a BAR be resized to).
> 
> According to the spec, it is illegal to not have a bit set in
> PCI_REBAR_CAP, and 1 MB is the smallest size allowed.
> 
> Set bit 4 in PCI_REBAR_CAP, so that we actually advertise support for a
> 1 MB BAR size.
> 
> Before:
>         Capabilities: [2e8 v1] Physical Resizable BAR
>                 BAR 0: current size: 1MB
>                 BAR 1: current size: 1MB
>                 BAR 2: current size: 1MB
>                 BAR 3: current size: 1MB
>                 BAR 4: current size: 1MB
>                 BAR 5: current size: 1MB
> After:
>         Capabilities: [2e8 v1] Physical Resizable BAR
>                 BAR 0: current size: 1MB, supported: 1MB
>                 BAR 1: current size: 1MB, supported: 1MB
>                 BAR 2: current size: 1MB, supported: 1MB
>                 BAR 3: current size: 1MB, supported: 1MB
>                 BAR 4: current size: 1MB, supported: 1MB
>                 BAR 5: current size: 1MB, supported: 1MB

Applied to controller/dwc, thank you!

[1/1] PCI: dwc: endpoint: Fix advertised resizable BAR size
      https://git.kernel.org/pci/pci/c/72e34b8593e0

	Krzysztof