diff options
Diffstat (limited to 'drivers/nvdimm/claim.c')
| -rw-r--r-- | drivers/nvdimm/claim.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/nvdimm/claim.c b/drivers/nvdimm/claim.c index d5dc80c48b4c..8d66fbb779ed 100644 --- a/drivers/nvdimm/claim.c +++ b/drivers/nvdimm/claim.c @@ -226,6 +226,12 @@ static int nsio_rw_bytes(struct nd_namespace_common *ndns, resource_size_t offset, void *buf, size_t size, int rw) { struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev); + unsigned int sz_align = ALIGN(size + (offset & (512 - 1)), 512); + sector_t sector = offset >> 9; + int rc = 0; + + if (unlikely(!size)) + return 0; if (unlikely(offset + size > nsio->size)) { dev_WARN_ONCE(&ndns->dev, 1, "request out of range\n"); @@ -233,17 +239,33 @@ static int nsio_rw_bytes(struct nd_namespace_common *ndns, } if (rw == READ) { - unsigned int sz_align = ALIGN(size + (offset & (512 - 1)), 512); - - if (unlikely(is_bad_pmem(&nsio->bb, offset / 512, sz_align))) + if (unlikely(is_bad_pmem(&nsio->bb, sector, sz_align))) return -EIO; return memcpy_from_pmem(buf, nsio->addr + offset, size); } else { + + if (unlikely(is_bad_pmem(&nsio->bb, sector, sz_align))) { + if (IS_ALIGNED(offset, 512) && IS_ALIGNED(size, 512)) { + long cleared; + + cleared = nvdimm_clear_poison(&ndns->dev, + offset, size); + if (cleared != size) { + size = cleared; + rc = -EIO; + } + + badblocks_clear(&nsio->bb, sector, + cleared >> 9); + } else + rc = -EIO; + } + memcpy_to_pmem(nsio->addr + offset, buf, size); nvdimm_flush(to_nd_region(ndns->dev.parent)); } - return 0; + return rc; } int devm_nsio_enable(struct device *dev, struct nd_namespace_io *nsio) |