Confusing /proc/pci output

[Simon Vallet <svallet@inapg.inra.fr>]

Hi,

I just got an ethernet card for my machine, and wanted
to check that everything is allright.
Looking at /proc/pci, i get the following :

eqdar@uqbar:~$ cat /proc/pci
PCI devices found:
  Bus  0, device  11, function  0:
    Host bridge: Apple Computer Inc. Bandit PowerPC host bridge (rev 3).
      IRQ 22.
      Master Capable.  Latency=32.  
  Bus  0, device  14, function  0:
    VGA compatible controller: ATI Technologies Inc 3D Rage LT Pro (rev 220).
      IRQ 25.
      Master Capable.  Latency=32.  Min Gnt=8.
      Non-prefetchable 32 bit memory at 0x81000000 [0x81ffffff].
      I/O at 0x400 [0x4ff].
      Non-prefetchable 32 bit memory at 0x80801000 [0x80801fff].
  Bus  0, device  16, function  0:
    Class ff00: Apple Computer Inc. O'Hare I/O (rev 1).
      IRQ 22.
      Master Capable.  Latency=32.  
      Non-prefetchable 32 bit memory at 0xf3000000 [0xf307ffff].
  Bus  0, device  17, function  0:
    Ethernet controller: Digital Equipment Corporation DECchip 21041 [Tulip Pass 3] (rev 33).
      IRQ 22.
      Master Capable.  Latency=32.  
      I/O at 0x1000 [0x107f].
      Non-prefetchable 32 bit memory at 0x80800000 [0x8080007f].

("bandit" is the pci controller, and "ohare" is the I/O controller,
both the ati and ethernet cards are accessible directly from bandit (OF)).

'dmesg' doesn't show any obvious errors, but I'm confused...
Is it normal that some devices share the same IRQ (22) ?

Thanks,
Simon

-- 
Simon Vallet
Institut National Agronomique Paris-Grignon
svallet@inapg.inra.fr