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.
Signed-off-by: Dave Jiang <[email protected]> --- drivers/nvdimm/bus.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 458daf9..935866f 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; _______________________________________________ Linux-nvdimm mailing list [email protected] https://lists.01.org/mailman/listinfo/linux-nvdimm
