Re: [PATCH] Remove process freezer from suspend to RAM pathway

On Tue, Jul 03, 2007 at 06:21:42PM -0400, Alan Stern wrote:

On Tue, 3 Jul 2007, Matthew Garrett wrote:

quoted

We're used to the idea of applications blocking when a resource they're 
using goes away - NFS has done it forever. 

You persist in evading my point.  I'm not worried about applications;  
I'm worried about drivers.

Let me put it explicitly: You're writing a driver.  You're working on
the read, write, or probe method.  You add code to check if a system
sleep is underway.  Suppose the answer is Yes -- what does your driver
do next?

Leave the process blocked and defer any i/o until after resume. Why does 
it need to be any more complicated than that?

-- 
Matthew Garrett | mjg59@srcf.ucam.org