pciehp: Setting maxpayload after hot_plug ?

pciehp: Setting maxpayload after hot_plug ?

[Xavier Bru]

Hello,

I have a concern around hot-plugging a pci adapter that sits behind a 
pci switch port, using the pciehp driver:
     . When  I boot with the adapter plugged, the maxpayload is set to 
256 (as the pci switch upstream port is connected to a port that has the 
capability maxpayload%6.
     . In case  I hot-replace this adapter, after hot-plugging the 
adapter, the maxpayload value is set to the default value (128).
     . In case there was no adapter plugged at boot time, the 
corresponding pci port has a default maxpayload\x128, and after 
hot-plugging the board, the pci port and the board stay with maxpayload\x128.

So, here is my question: should the pciehp driver be aware of the 
maxpayload, and re-initialize it in the pci bus hierarchy and on the 
board (has it is done I suppose by BIOS initialization when the board is 
present ) ? Else, who is in charge to reinitialize the maxpayload to the 
right value ?

Thanks in advance for your help.

Xavier