Fix crash if no devices and ibv_get_device_list() is called multiple times
If no devices are found, ibverbs_init() sets num_devices to 0. This
means the next call to __ibv_get_device_list() would call
ibverbs_init() again, which crashes because ibverbs_init() leaves
various internal pointers pointing to freed memory.
Fix this by using pthread_once() to call ibverbs_init() exactly once,
and then doing the right thing even if num_devices stays 0.
Tested-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
1 file changed
