On Mon, Jul 26, 2010 at 02:02:46PM +0900, Isaku Yamahata wrote: > When allocating bar, overflow can occur. > So add overflow check and don't allocate bar if overflowed. > Overflow check is ugly, but necessary. > Another suggested way is to change related variables u64 from u32 > thus overflow can't occur because the related value are all u32 addressable. > Anyway even with u64, it is necessary to the resulted value > max_u32.
I wonder if we could create malloc zones for this and then use pmm_alloc. The pmm_alloc function already handles overflow and alignments. One difficulty, though, is that pmm_alloc doesn't guarentee linear allocations, and it looks like pci_bios_init_device_bridge assumes this. -Kevin
