4.19-stable review patch. If anyone has any objections, please let me know.
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From: Wei Yang richardw.yang@linux.intel.com
commit f101ada7da6551127d192c2f1742c1e9e0f62799 upstream.
When trying to see whether current nd_region intersects with others, trim_pfn_device() has already calculated the *size* to be expanded to SECTION size.
Do not double append 'adjust' to 'size' when calculating whether the end of a region collides with the next pmem region.
Fixes: ae86cbfef381 "libnvdimm, pfn: Pad pfn namespaces relative to other regions" Cc: stable@vger.kernel.org Signed-off-by: Wei Yang richardw.yang@linux.intel.com Signed-off-by: Dan Williams dan.j.williams@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/nvdimm/pfn_devs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/nvdimm/pfn_devs.c +++ b/drivers/nvdimm/pfn_devs.c @@ -619,7 +619,7 @@ static void trim_pfn_device(struct nd_pf if (region_intersects(start, size, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE) == REGION_MIXED || !IS_ALIGNED(end, nd_pfn->align) - || nd_region_conflict(nd_region, start, size + adjust)) + || nd_region_conflict(nd_region, start, size)) *end_trunc = end - phys_pmem_align_down(nd_pfn, end); }