[BUG] scsi: myrb: null-pointer-dereference in myrb_cleanup

[Zheyu Ma]

Hello,

I found a bug in the driver myrb when probing the module.
The following log can reveal it:

[    0.985741] myrb 0000:00:05.0: Unknown Initialization Error 49
[    0.986078] myrb 0000:00:05.0: Failed to initialize Controller
[    0.986376] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    0.987368] Call Trace:
[    0.987368]  myrb_cleanup+0x4ad/0x7b0
[    0.987368]  myrb_probe.cold+0x95/0x12a0

The reason is that the driver does not initialize the disable_intr,
resulting in a null-pointer-dereference bug.

Zheyu Ma