One problem in reassign pci bus number?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



All,

I am reading the pci_scan_bridge() and not sure what will happen in
following situation.

Suppose the kernel is not passed the pci=assign-busses.

Below is a picture about the pci system.

                   +-------+       
                   |       | root bridge(0,255)
                   +---+---+       
                       |          Bus 0 
      -----+-----------+------------------------------+--
           |                                          |
           |                                          |
           |                                          |
      +----+----+                               +-----+-----+
      |         |  B1(1,15)                     |           |B2(16,28)
      +----+----+                               +-----+-----+
           |  Bus 1                                   |    Bus 16           
      -----+-----------------------         ----------+----------------
                            |
                       +----+----+
                       |         | B3               
                       +---------+                
                                                 
Suppose B1 and B2 works fine with the BIOS, which get the right bus
number and range.

B3 does not works fine with the BIOS, which doesn't get the bus number.

So in pci_scan_bridge(), B3 will be met in the second pass and get bus
number 16?
Would this be a conflict?

-- 
Richard Yang
Help you, Help me

--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [DMA Engine]     [Linux Coverity]     [Linux USB]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Greybus]

  Powered by Linux