diff options
Diffstat (limited to 'drivers/cxl')
| -rw-r--r-- | drivers/cxl/core/region.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 641bc6344a4a..401148016978 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -395,13 +395,14 @@ static ssize_t interleave_granularity_store(struct device *dev, return rc; /* - * Disallow region granularity less than root granularity to - * simplify the implementation. Otherwise, region's with a - * granularity less than the root interleave result in needing - * multiple endpoints to support a single slot in the - * interleave. + * When the host-bridge is interleaved, disallow region granularity != + * root granularity. Regions with a granularity less than the root + * interleave result in needing multiple endpoints to support a single + * slot in the interleave (possible to suport in the future). Regions + * with a granularity greater than the root interleave result in invalid + * DPA translations (invalid to support). */ - if (val < cxld->interleave_granularity) + if (cxld->interleave_ways > 1 && val != cxld->interleave_granularity) return -EINVAL; rc = down_write_killable(&cxl_region_rwsem); |