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authorDave Jiang <dave.jiang@intel.com>2016-09-09 09:10:08 -0700
committerDan Williams <dan.j.williams@intel.com>2016-09-09 17:34:46 -0700
commit1e8b8d9619f9476e94f32eb20cab000d50d236aa (patch)
tree916ab96acbdc05f548e85b3897be7167276b3e4f /drivers/nvdimm
parent2e21807d4b131dfd4a8e5c82116a85b62f28aeec (diff)
downloadlinux-1e8b8d9619f9476e94f32eb20cab000d50d236aa.tar.bz2
libnvdimm: allow legacy (e820) pmem region to clear bad blocks
Bad blocks can be injected via /sys/block/pmemN/badblocks. In a situation where legacy pmem is being used or a pmem region created by using memmap kernel parameter, the injected bad blocks are not cleared due to nvdimm_clear_poison() failing from lack of ndctl function pointer. In this case we need to just return as handled and allow the bad blocks to be cleared rather than fail. Reviewed-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/bus.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 458daf927336..935866fe5ec2 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -185,8 +185,12 @@ long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
return -ENXIO;
nd_desc = nvdimm_bus->nd_desc;
+ /*
+ * if ndctl does not exist, it's PMEM_LEGACY and
+ * we want to just pretend everything is handled.
+ */
if (!nd_desc->ndctl)
- return -ENXIO;
+ return len;
memset(&ars_cap, 0, sizeof(ars_cap));
ars_cap.address = phys;