A MegaRAID PCI card in my rp5470 acts as PCI-PCI bridge.
Resource allocation for PCI devices behind such a bridge is quite incomplete,
so that syslog reports those warnings:

 LBA 0:10: PCI host bridge to bus 0000:50
 pci_bus 0000:50: root bus resource [io  0x80000-0x8ffff] (bus address [0x0000-0xffff])
 pci_bus 0000:50: root bus resource [mem 0xffffffff94000000-0xffffffff95ffffff] (bus address [0x94000000-0x95ffffff])
 pci_bus 0000:50: root bus resource [bus 50-57]
 pci 0000:50:00.0: [8086:0964] type 01 class 0x060400
 pci 0000:50:00.1: [8086:1960] type 00 class 0x0e0001
 pci 0000:50:00.1: reg 0x10: [mem 0x00000000-0x003fffff pref]
 pci 0000:50:00.1: reg 0x30: [mem 0x00000000-0x00007fff pref]
 pci 0000:50:00.0: Changing bridge control from 0x00000000 to 0x00000023
 pci_bus 0000:51: busn_res: can not insert [bus 51-ff] under [bus 50-57] (conflicts with (null) [bus 50-57])
 pci 0000:50:00.0: PCI bridge to [bus 51-ff]
 pci 0000:50:00.0:   bridge window [io  0x80000-0x80fff]
 pci 0000:50:00.0:   bridge window [mem 0x00000000-0x000fffff]
 pci 0000:50:00.0:   bridge window [mem 0x00000000-0x000fffff pref]
 pci 0000:50:00.0: can't claim BAR 14 [mem 0x00000000-0x000fffff]: no compatible bridge window
 pci 0000:50:00.0: can't claim BAR 15 [mem 0x00000000-0x000fffff pref]: no compatible bridge window
 pci 0000:50:00.0: can't claim BAR 16 [??? 0x00000000 flags 0x0]: no compatible bridge window
 pci_bus 0000:51: busn_res: [bus 51-ff] end is updated to 51
 pci 0000:50:00.0: BAR 16: [??? 0x00000000 flags 0x20000000] has bogus alignment
 pci 0000:50:00.1: BAR 0: assigned [mem 0xffffffff94000000-0xffffffff943fffff pref]
 pci 0000:50:00.0: BAR 14: assigned [mem 0xffffffff94400000-0xffffffff944fffff]
 pci 0000:50:00.0: BAR 15: assigned [mem 0xffffffff94500000-0xffffffff945fffff pref]
 pci 0000:50:00.1: BAR 6: assigned [mem 0xffffffff94600000-0xffffffff94607fff pref]
 pci 0000:50:00.0: PCI bridge to [bus 51]
 pci 0000:50:00.0:   bridge window [io  0x80000-0x80fff]
 pci 0000:50:00.0:   bridge window [mem 0xffffffff94400000-0xffffffff944fffff]
 pci 0000:50:00.0:   bridge window [mem 0xffffffff94500000-0xffffffff945fffff pref]

The patch below tries to improve the resource allocation.
Output is now:

 LBA 0:10: PCI host bridge to bus 0000:50
 pci_bus 0000:50: root bus resource [io  0x80000-0x8ffff] (bus address [0x0000-0xffff])
 pci_bus 0000:50: root bus resource [mem 0xffffffff94000000-0xffffffff95ffffff] (bus address [0x94000000-0x95ffffff])
 pci_bus 0000:50: root bus resource [bus 50-57]
 pci 0000:50:00.0: Changing bridge control from 0x00000000 to 0x00000023
 pci 0000:50:00.0: PCI bridge to [bus 51-ff]
 pci 0000:50:00.1: BAR 0: assigned [mem 0xffffffff94000000-0xffffffff943fffff pref]
 pci 0000:50:00.1: BAR 6: assigned [mem 0xffffffff94400000-0xffffffff94407fff pref]
 pci 0000:50:00.0: PCI bridge to [bus 51]
 pci 0000:50:00.0:   bridge window [io  0x80000-0x80fff]

Signed-off-by: Helge Deller <deller@gmx.de>