Andi Kleen wrote:
>>The problem I am trying to solve is the userspace PCI access methods 
>>accessing my config space when the adapter is not able to handle such an 
>>access. Today these accesses bypass the device driver altogether and 
>>there is no way to stop them. An alternative to this patch would be to 
> 
> 
> For this I would add a semaphore or a lock bit to pci_dev.
> Probably a simple flag is good enough that is checked by sysfs/proc
> and return EBUSY when set. 

How about something like this... (only compile tested at this point)


-- 
Brian King
eServer Storage I/O
IBM Linux Technology Center