Commit 45df5d3d authored by Huaisheng Ye's avatar Huaisheng Ye Committed by Dave Jiang

tools/testing/nvdimm: kaddr and pfn can be NULL to ->direct_access()

The mock / test version of pmem_direct_access() needs to check the
validity of pointers kaddr and pfn for NULL assignment. If anyone
equals to NULL, it doesn't need to calculate the value.

If pointer equals to NULL, that is to say callers may have no need for
kaddr or pfn, so this patch is prepared for allowing them to pass in
NULL instead of having to pass in a local pointer or variable that
they then just throw away.
Suggested-by: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarHuaisheng Ye <yehs1@lenovo.com>
Reviewed-by: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
parent 036a82ca
......@@ -31,8 +31,10 @@ long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
if (get_nfit_res(pmem->phys_addr + offset)) {
struct page *page;
if (kaddr)
*kaddr = pmem->virt_addr + offset;
page = vmalloc_to_page(pmem->virt_addr + offset);
if (pfn)
*pfn = page_to_pfn_t(page);
pr_debug_ratelimited("%s: pmem: %p pgoff: %#lx pfn: %#lx\n",
__func__, pmem, pgoff, page_to_pfn(page));
......@@ -40,7 +42,9 @@ long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
return 1;
}
if (kaddr)
*kaddr = pmem->virt_addr + offset;
if (pfn)
*pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags);
/*
......
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