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| author |   Dan Williams <dan.j.williams@intel.com> | 2016-03-06 15:20:51 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-03-09 15:12:41 -0800 |
| commit | b5ebc8ec693281c3c1efff7459a069cbd8b9a149 (patch) | |
| tree | 92bc9801d0107bdc3aa88a62bfa2cbc24582cd11 /drivers/nvdimm | |
| parent | nfit, libnvdimm: clear poison command support (diff) | |
| download | linux-dev-b5ebc8ec693281c3c1efff7459a069cbd8b9a149.tar.xz linux-dev-b5ebc8ec693281c3c1efff7459a069cbd8b9a149.zip | |
libnvdimm, pmem: fix kmap_atomic() leak in error path
When we enounter a bad block we need to kunmap_atomic() before
returning.
Cc: <stable@vger.kernel.org>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/pmem.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index efc2a5e671c6..e7b86a7fca0a 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -66,22 +66,25 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page, unsigned int len, unsigned int off, int rw, sector_t sector) { + int rc = 0; void *mem = kmap_atomic(page); phys_addr_t pmem_off = sector * 512 + pmem->data_offset; void __pmem *pmem_addr = pmem->virt_addr + pmem_off; if (rw == READ) { if (unlikely(is_bad_pmem(&pmem->bb, sector, len))) - return -EIO; - memcpy_from_pmem(mem + off, pmem_addr, len); - flush_dcache_page(page); + rc = -EIO; + else { + memcpy_from_pmem(mem + off, pmem_addr, len); + flush_dcache_page(page); + } } else { flush_dcache_page(page); memcpy_to_pmem(pmem_addr, mem + off, len); } kunmap_atomic(mem); - return 0; + return rc; } static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio) |