[PATCH 3/6] pmem: pmem_dax_direct_access() to honor the DAXDEV_F_RECOVERY flag

Jane Chu
2021-10-21T00:12:40Z

Let pmem_dax_direct_access() skip badblock checking if the caller
intends to do data recovery by providing the DAXDEV_F_RECOVERY flag.

Signed-off-by: Jane Chu <jane.chu@oracle.com>
---
drivers/nvdimm/pmem.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index b0b7fd40560e..ed699416655b 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -260,8 +260,9 @@ __weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
{
resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset;

- if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
- PFN_PHYS(nr_pages))))
+ if (unlikely(!(flags & DAXDEV_F_RECOVERY) &&
+ is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
+ PFN_PHYS(nr_pages))))
return -EIO;

if (kaddr)
--
2.18.4