[PATCH for v4.9 LTS 73/87] scsi: qla2xxx: Get mutex lock before checking optrom_state

From: "Milan P. Gandhi" [ Upstream commit c7702b8c22712a06080e10f1d2dee1a133ec8809 ] There is a race condition with qla2xxx optrom functions where one thread might modify optrom buffer, optrom_state while other thread is still reading from it. In couple of crashes, it was

[PATCH for v4.9 LTS 73/87] scsi: qla2xxx: Get mutex lock before checking optrom_state

From: "Milan P. Gandhi" [ Upstream commit c7702b8c22712a06080e10f1d2dee1a133ec8809 ] There is a race condition with qla2xxx optrom functions where one thread might modify optrom buffer, optrom_state while other thread is still reading from it. In couple of crashes, it was found that we had