234 	struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;  in nd_pfn_validate()  local
238 	if (!pfn_sb || !ndns)  in nd_pfn_validate()
248 	if (nvdimm_read_bytes(ndns, SZ_4K, pfn_sb, sizeof(*pfn_sb)))  in nd_pfn_validate()
251 	if (memcmp(pfn_sb->signature, PFN_SIG, PFN_SIG_LEN) != 0)  in nd_pfn_validate()
254 	checksum = le64_to_cpu(pfn_sb->checksum);  in nd_pfn_validate()
255 	pfn_sb->checksum = 0;  in nd_pfn_validate()
256 	if (checksum != nd_sb_checksum((struct nd_gen_sb *) pfn_sb))  in nd_pfn_validate()
258 	pfn_sb->checksum = cpu_to_le64(checksum);  in nd_pfn_validate()
260 	switch (le32_to_cpu(pfn_sb->mode)) {  in nd_pfn_validate()
272 		nd_pfn->uuid = kmemdup(pfn_sb->uuid, 16, GFP_KERNEL);  in nd_pfn_validate()
277 		if (memcmp(nd_pfn->uuid, pfn_sb->uuid, 16) != 0)  in nd_pfn_validate()
287 	offset = le64_to_cpu(pfn_sb->dataoff);  in nd_pfn_validate()
309 	struct nd_pfn_sb *pfn_sb;  in nd_pfn_probe()  local
321 	pfn_sb = kzalloc(sizeof(*pfn_sb), GFP_KERNEL);  in nd_pfn_probe()
323 	nd_pfn->pfn_sb = pfn_sb;  in nd_pfn_probe()
325 	nd_pfn->pfn_sb = NULL;  in nd_pfn_probe()
326 	kfree(pfn_sb);  in nd_pfn_probe()