On 01/09/2012 04:50 PM, Alan Stern wrote:
On Mon, 9 Jan 2012, Sebastian Andrzej Siewior wrote:
This patch adds sg support to dummy_hcd. It seems that uas is not able
to work with a hcd which does not support sg only based transfers.
Sometimes it helps to take a second look at things...
+ BUG_ON(!sg_miter_next(miter));
...
+ BUG_ON(!sg_miter_next(miter));
BUG_ON is often a very bad idea. It will hang the system if it ever
triggers in interrupt context. Basically, BUG_ON should be used only
in situations where things are messed up so badly that crashing is
better than continuing execution.
This should not happen at all. It happened during testing while I
forgot to advance the counter. If it happens again during testing, I'm
fine with it because helps catching bugs early.
You want them out? I actually have no idea how to recover except to
give up the transfer.
Alan Stern
Sebastian
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