Hi,

Carsten Behling wrote on 2011-11-23:

quoted

this case is already catched in at91_do_twi_transfer():

Sorry, I did not found this code in your patch.
(http://www.mail-archive.com/linux-i2c at vger.kernel.org/msg06556.html):

quoted

+       if (is_read) {
+               if (!dev->buf_len)

yes, this won't work for buf_len == 1. It is corrected in
https://lkml.org/lkml/2011/11/18/223 which I held back for some time
as it should have been just a feature extension. I was not aware it
also fixed the buf_len = 1 bug. Sorry for that...

(Explanation: in the first implementation I immediately decremented
buf_len, so buf_len == 1 could not occur. Later I removed that but
did not fully fold it into the base patch.)

Thanks,
Niko