diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvdimm/pmem.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 571a6c7ee2fc..42b3a8217073 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -66,13 +66,32 @@ static void pmem_clear_poison(struct pmem_device *pmem, phys_addr_t offset, invalidate_pmem(pmem->virt_addr + offset, len); } +static void write_pmem(void *pmem_addr, struct page *page, + unsigned int off, unsigned int len) +{ + void *mem = kmap_atomic(page); + + memcpy_to_pmem(pmem_addr, mem + off, len); + kunmap_atomic(mem); +} + +static int read_pmem(struct page *page, unsigned int off, + void *pmem_addr, unsigned int len) +{ + int rc; + void *mem = kmap_atomic(page); + + rc = memcpy_from_pmem(mem + off, pmem_addr, len); + kunmap_atomic(mem); + return rc; +} + static int pmem_do_bvec(struct pmem_device *pmem, struct page *page, unsigned int len, unsigned int off, bool is_write, sector_t sector) { int rc = 0; bool bad_pmem = false; - void *mem = kmap_atomic(page); phys_addr_t pmem_off = sector * 512 + pmem->data_offset; void *pmem_addr = pmem->virt_addr + pmem_off; @@ -83,7 +102,7 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page, if (unlikely(bad_pmem)) rc = -EIO; else { - rc = memcpy_from_pmem(mem + off, pmem_addr, len); + rc = read_pmem(page, off, pmem_addr, len); flush_dcache_page(page); } } else { @@ -102,14 +121,13 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page, * after clear poison. */ flush_dcache_page(page); - memcpy_to_pmem(pmem_addr, mem + off, len); + write_pmem(pmem_addr, page, off, len); if (unlikely(bad_pmem)) { pmem_clear_poison(pmem, pmem_off, len); - memcpy_to_pmem(pmem_addr, mem + off, len); + write_pmem(pmem_addr, page, off, len); } } - kunmap_atomic(mem); return rc; } |