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event: fix null pointer issue in spdk_subsystem_fini

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The variable cur could be null, so if we use do while
will cause a segment fault

Change-Id: I19ec26e88948a0c3fd957e03e717b68750f40c62
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
This commit is contained in:
Ziye Yang 2016-06-14 15:19:38 +08:00 committed by Jim Harris
parent 5603ff07b9
commit e87e3df674
1 changed files with 4 additions and 2 deletions
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6
lib/event/subsystem.c
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@ -149,14 +149,16 @@ spdk_subsystem_fini(void)
struct spdk_subsystem *cur; struct spdk_subsystem *cur;
cur = TAILQ_LAST(&g_subsystems, spdk_subsystem_list); cur = TAILQ_LAST(&g_subsystems, spdk_subsystem_list);
do {
while (cur) {
if (cur->fini) { if (cur->fini) {
rc = cur->fini(); rc = cur->fini();
if (rc) if (rc)
return rc; return rc;
} }
cur = TAILQ_PREV(cur, spdk_subsystem_list, tailq); cur = TAILQ_PREV(cur, spdk_subsystem_list, tailq);
} while (cur); }
return rc; return rc;
} }