From: Benjamin Herrenschmidt benh@kernel.crashing.org
[ Upstream commit 3cfb9ebe906b51f2942b1e251009bb251efd2ba6 ]
The bamboo dts has a bug: it uses a non-naturally aligned range for PCI memory space. This isnt' supported by the code, thus causing PCI to break on this system.
This is due to the fact that while the chip memory map has 1G reserved for PCI memory, it's only 512M aligned. The code doesn't know how to split that into 2 different PMMs and fails, so limit the region to 512M.
Signed-off-by: Benjamin Herrenschmidt benh@kernel.crashing.org Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/boot/dts/bamboo.dts | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/boot/dts/bamboo.dts b/arch/powerpc/boot/dts/bamboo.dts index 538e42b1120d8..b5861fa3836c1 100644 --- a/arch/powerpc/boot/dts/bamboo.dts +++ b/arch/powerpc/boot/dts/bamboo.dts @@ -268,8 +268,10 @@ /* Outbound ranges, one memory and one IO, * later cannot be changed. Chip supports a second * IO range but we don't use it for now + * The chip also supports a larger memory range but + * it's not naturally aligned, so our code will break */ - ranges = <0x02000000 0x00000000 0xa0000000 0x00000000 0xa0000000 0x00000000 0x40000000 + ranges = <0x02000000 0x00000000 0xa0000000 0x00000000 0xa0000000 0x00000000 0x20000000 0x02000000 0x00000000 0x00000000 0x00000000 0xe0000000 0x00000000 0x00100000 0x01000000 0x00000000 0x00000000 0x00000000 0xe8000000 0x00000000 0x00010000>;