On Fri, Jun 14, 2019 at 03:20:12PM +0100, Srinivas Kandagatla wrote: > For some reason arguments to most of the circular buffers > macros are used in reverse, tail is used for head and vice versa. > > This leads to bam thinking that there is an extra descriptor at the > end and leading to retransmitting descriptor which was not scheduled > by any driver. This happens after MAX_DESCRIPTORS (4096) are scheduled > and done, so most of the drivers would not notice this, unless they are > heavily using bam dma. Originally found this issue while testing > SoundWire over SlimBus on DB845c which uses DMA very heavily for > read/writes. > > Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> Reviewed-by: Andy Gross <agross@xxxxxxxxxx>
