Re: [PATCH] of/irq: Fix msi-map calculation for nonzero rid-base

From: Robin Murphy
Date: Tue Feb 09 2016 - 11:17:45 EST


On 09/02/16 16:08, Mark Rutland wrote:
[...]

having msi-map-mask clash with a nonzero rid-base, as that's another
thing one can easily get wrong.

[...]

+ if (rid_base & ~map_mask) {
+ dev_err(parent_dev,
+ "Invalid msi-map translation - msi-map-mask (0x%x) ignores rid-
base (0x%x)\n",
+ map_mask, rid_base);
+ return rid_out;
+ }

[...]

msi-map = <0x0100 &its 0x11 0x1>;
msi-map-mask = <0xff>;


I'd say that this is an inconsistent set of properties, and it's
probably worth warning if we encounter this. There is no possible way
that rid-base can be encountered.

Indeed ;)

Robin.

Thanks,
Mark.