| Message ID | 164688416128.2879318.17890707310125575258.stgit@dwillia2-desk3.amr.corp.intel.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | libnvdimm: Jettison block-aperture-window support | expand |
On Wed, Mar 09, 2022 at 07:49:21PM -0800, Dan Williams wrote: > In preparation for removing BLK aperture support the NVDIMM unit tests > discovered that the default alignment can be set higher than the > capacity of the region. Fall back to PAGE_SIZE in that case. > > Given this has not been seen in the wild, elide notifying -stable. Looks good, Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 9ccf3d608799..70ad891a76ba 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -1025,6 +1025,9 @@ static unsigned long default_align(struct nd_region *nd_region) } } + if (nd_region->ndr_size < MEMREMAP_COMPAT_ALIGN_MAX) + align = PAGE_SIZE; + mappings = max_t(u16, 1, nd_region->ndr_mappings); div_u64_rem(align, mappings, &remainder); if (remainder)
In preparation for removing BLK aperture support the NVDIMM unit tests discovered that the default alignment can be set higher than the capacity of the region. Fall back to PAGE_SIZE in that case. Given this has not been seen in the wild, elide notifying -stable. Fixes: 2522afb86a8c ("libnvdimm/region: Introduce an 'align' attribute") Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- drivers/nvdimm/region_devs.c | 3 +++ 1 file changed, 3 insertions(+)