It all depends on what kind of surgery you had. If you can find out and let me know I can give you a better idea.
So was it a tympanoplasty? Where they place a patch on the tympanic membrane to patch the hole?
It sounds like it was a tympanoplasty. If that the case, and the surgery was more than 120 days ago, there should be no issues as long as it healed and your hearing is within the limits.
If your physician states that your hearing is normal you will not have any issues. You would have to have a moderate hearing loss for there to possibly be any issues.