Merge tag 'libnvdimm-for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm...

[linux-2.6-block.git] / drivers / nvdimm / pfn_devs.c

diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index ce9ef18282dd0491a21a273e5bd20fe5967bf04f..bb9cc5cf087385647f51d4522981d47f317cc45e 100644 (file)
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -676,6 +676,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
        resource_size_t start, size;
        struct nd_region *nd_region;
        unsigned long npfns, align;
+       u32 end_trunc;
        struct nd_pfn_sb *pfn_sb;
        phys_addr_t offset;
        const char *sig;
@@ -717,6 +718,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
        size = resource_size(&nsio->res);
        npfns = PHYS_PFN(size - SZ_8K);
        align = max(nd_pfn->align, (1UL << SUBSECTION_SHIFT));
+       end_trunc = start + size - ALIGN_DOWN(start + size, align);
        if (nd_pfn->mode == PFN_MODE_PMEM) {
                /*
                 * The altmap should be padded out to the block size used
@@ -743,7 +745,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
                return -ENXIO;
        }
 
-       npfns = PHYS_PFN(size - offset);
+       npfns = PHYS_PFN(size - offset - end_trunc);
        pfn_sb->mode = cpu_to_le32(nd_pfn->mode);
        pfn_sb->dataoff = cpu_to_le64(offset);
        pfn_sb->npfns = cpu_to_le64(npfns);
@@ -752,6 +754,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
        memcpy(pfn_sb->parent_uuid, nd_dev_to_uuid(&ndns->dev), 16);
        pfn_sb->version_major = cpu_to_le16(1);
        pfn_sb->version_minor = cpu_to_le16(4);
+       pfn_sb->end_trunc = cpu_to_le32(end_trunc);
        pfn_sb->align = cpu_to_le32(nd_pfn->align);
        pfn_sb->page_struct_size = cpu_to_le16(MAX_STRUCT_PAGE_SIZE);
        pfn_sb->page_size = cpu_to_le32(PAGE_SIZE);