Re: [PATCH] driver core: flush async calls before testing driver removal

[Tejun Heo]

Hello,

On Sun, Dec 11, 2016 at 03:44:36AM +0200, Vladimir Zapolskiy wrote:
> On 12/10/2016 03:04 PM, Greg Kroah-Hartman wrote:
> > Hm, how does this not also get hit if you unbind/bind/unbind/bind/etc.
> > from userspace as well?  I don't think this is a
> > CONFIG_DEBUG_TEST_DRIVER_REMOVE issue, but just that this option finds
> > the problem corner cases as you are finding out :)
> > 
> 
> and you are right, I managed to reproduce exactly the same race as before
> running the unmodified kernel built from Torvald's branch head:

Ah, you're right, so this means we need to add flush to all async
probing drivers.  Will do so for libata shortly.

Thanks!

-- 
tejun