xf86MapPciMem and freeing memory

[Donald Kayser]

I have been working on the xf86-video-chips driver to support 2  
monitors on a PPC. I have noticed that memory allocated with  
xf86MapPciMem() function call is returned with xf86UnMapVidMem. Every  
time memory is freed there is an error message indicating that the  
memory is not in the expected list that xf86UnMapVidMem() uses. This  
is bothersome since in FullMMIO mode for the driver, memory is  
allocated then freed during CHIPSProbe(). I have looked for the entry  
point for xf86MapPciMem() and have not been able to locate it; this  
would at least allow me to see how the memory is allocated. I have  
looked at all vf86-video drivers and they all call the  
xf86UnMapVidMem() function to return memory, and I assume they all  
fail. So, is there a better function to call to free memory allocated  
by xf86MapPciMem()?

Donald Kayser
xorg at kayser.net