[PATCH 4.15 007/163] IB/core: Avoid a potential OOPs for an unused optional parameter

4.15-stable review patch. If anyone has any objections, please let me know. -- From: Michael J. Ruhl commit 2ff124d597c2df8696169ce0006fc974c49a4569 upstream. The ev_file is an optional parameter for CQ creation. If the parameter is not passed, the

[PATCH 4.15 007/163] IB/core: Avoid a potential OOPs for an unused optional parameter

4.15-stable review patch. If anyone has any objections, please let me know. -- From: Michael J. Ruhl commit 2ff124d597c2df8696169ce0006fc974c49a4569 upstream. The ev_file is an optional parameter for CQ creation. If the parameter is not passed, the ev_file pointer will be