Fix Nginx worker process core dump in QAT_SW with pkill/killall.

Nginx worker process doesn't exit normally with pkill/killall scenario resulting in core dump. thread_local_destructor is called explicitly in engine finish and key is deleted within engine_finish. Signed-off-by: Yuan, Shuai <shuai.yuan@intel.com> Signed-off-by: Yogaraj Alamenda <yogarajx.alamenda@intel.com>

Author: ShuaiYuan21

qat_sw_init.c

@@ -89,7 +89,6 @@
 mb_thread_data* mb_check_thread_local(void)
 {
  mb_thread_data *tlv = (mb_thread_data *)pthread_getspecific(mb_thread_key);
-
  if (tlv != NULL) {
  return tlv;
  }
@@ -531,6 +530,10 @@ void mb_thread_local_destructor(void *tlv_ptr)
  } else {
  DEBUG("tlv NULL\n");
  }
+
+ if (pthread_key_delete(mb_thread_key) != 0) {
+ WARN("Failed to delete pthread key.\n");
+ }
 }
 
 int multibuff_init(ENGINE *e)
@@ -566,6 +569,7 @@ int multibuff_init(ENGINE *e)
 int multibuff_finish_int(ENGINE *e, int reset_globals)
 {
  int ret = 1;
+ mb_thread_data *tlv;
 
  DEBUG("---- Multibuff Finishing...\n\n");
 
@@ -575,8 +579,8 @@ int multibuff_finish_int(ENGINE *e, int reset_globals)
  }
 
  PRINT_RDTSC_AVERAGES();
-
- ret = pthread_key_delete(mb_thread_key) == 0;
+ tlv = (mb_thread_data *)pthread_getspecific(mb_thread_key);
+ mb_thread_local_destructor(tlv);
 
  return ret;
 }