Dan Williams 33a5608671 libnvdimm, namespace: fix btt claim class crash ... Maurice reports: BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 IP: holder_class_store+0x253/0x2b0 [libnvdimm] ...while trying to reconfigure an NVDIMM-N namespace into 'sector' / 'btt' mode. The crash points to this line: (gdb) li *(holder_class_store+0x253) 0x7773 is in holder_class_store (drivers/nvdimm/namespace_devs.c:1420). 1415 for (i = 0; i < nd_region->ndr_mappings; i++) { 1416 struct nd_mapping *nd_mapping = &nd_region->mapping[i]; 1417 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 1418 struct nd_namespace_index *nsindex; 1419 1420 nsindex = to_namespace_index(ndd, ndd->ns_current); ...where we are failing because ndd is NULL due to NVDIMM-N dimms not supporting labels. Long story short, default to the BTTv1 format in the label-less / NVDIMM-N case. Fixes: 14e4945426 ("libnvdimm, btt: BTT updates for UEFI 2.7 format") Cc: <stable@vger.kernel.org> Cc: Vishal Verma <vishal.l.verma@intel.com> Reported-by: Maurice A. Saldivar <maurice.a.saldivar@hpe.com> Tested-by: Maurice A. Saldivar <maurice.a.saldivar@hpe.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2017-09-18 17:29:01 -07:00
..
blk.c
btt_devs.c
btt.c	libnvdimm for 4.14	2017-09-11 13:10:57 -07:00
btt.h
bus.c
claim.c
core.c
dax_devs.c
dimm_devs.c
dimm.c
e820.c
Kconfig
label.c
label.h
Makefile
namespace_devs.c	libnvdimm, namespace: fix btt claim class crash	2017-09-18 17:29:01 -07:00
nd-core.h
nd.h	libnvdimm for 4.14	2017-09-11 13:10:57 -07:00
pfn_devs.c
pfn.h
pmem.c	- Some request-based DM core and DM multipath fixes and cleanups	2017-09-14 13:43:16 -07:00
pmem.h
region_devs.c
region.c