Hi!

Yet again I try to fight cx23885 driver's "risc op code error" bug.

I found very weird "fix":
If I apply attached patch _AND_ enable KASAN, then problem disappear.
If I disable KASAN or delete _ANY_ new line from patch, then problem 
reappear.

I tried to replace "printk" with delays and with memory barriers, but 
nothing works.

I would like to hear from community any ideas:
1. why this "fix" helps
2. what weird things "printk" can do when KASAN enabled
3. why we need two consecutive "cx23885_irq_get_mask(dev);" commands, 
first of which need strange "companions"
4. what else I can try to use instead of "printk"


Raimonds Cicans