[PATCH] hvc_console: fix dropping of characters when output byte channel is full

[Timur Tabi]

Alan Cox wrote:
> Its a printk handler - better to lose the bytes than hang the box. I
> think the current code is probably right.

What do you think about this change:

http://lists.ozlabs.org/pipermail/linuxppc-dev/2009-October/thread.html#76830

This is the original version of my patch.  In it, I simply allow drivers to
return 0 to indicate that they're too busy to accept data.  It works great
on the hvc driver that we have in-house today, but it might break other
drivers that return 0 to indicate error.

-- 
Timur Tabi
Linux kernel developer at Freescale