Hi Denis,
When I added the function storvsc_suspend() several months ago, somehow I forgot
to remove the unnecessary memset(). Sorry!

The buffer is recreated in storvsc_resume() -> storvsc_connect_to_vsp() ->
storvsc_channel_init() -> stor_device->stor_chns = kcalloc(...), so I believe
the memset() can be safely removed. 

I'm not sure that I understand your description. As for me, memset with 0 before
memory freeing is required only for sensitive information and it's completely
unrelated to memory zeroing during allocation with kzalloc/kcalloc.
If it's not a sensitive information then memset could be safely removed.

Can you please make a v2 patch for it and Cc my corporate email "decui" (in To)?

Yes, of course. Could I add "Suggested-by"?

Thanks,
Denis