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lib/nvme: tolerate abnormal char device

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In some special cases, NVMe device with cdata.nn=0
may be used to do validation or other test work.
cdata.nn=0 means the device can't support NS at all.

Change-Id: I55f75a8cb21b8d1b99c5318e27c876a4371d6dd4
Signed-off-by: Liu Xiaodong <xiaodong.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/432191
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: joevannip <jparairo@nvxltech.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Liu Xiaodong 2018-11-06 11:56:00 -05:00 committed by Jim Harris
parent e93d56b1ed
commit 5aace13984
1 changed files with 6 additions and 0 deletions
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6
lib/nvme/nvme_ctrlr.c
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@ -909,6 +909,12 @@ nvme_ctrlr_identify_active_ns(struct spdk_nvme_ctrlr *ctrlr)
uint32_t next_nsid = 0;
uint32_t *new_ns_list = NULL;
if (ctrlr->num_ns == 0) {
spdk_dma_free(ctrlr->active_ns_list);
ctrlr->active_ns_list = NULL;
return 0;
}
/*
* The allocated size must be a multiple of sizeof(struct spdk_nvme_ns_list)