On Tue, Oct 11, 2016 at 02:13:41PM +0300, Nandor Han wrote: > The residue calculation was taking in consideration that dma > transaction status will be always retrieved in the dma callback > used to inform that dma transfer is complete. However this is not > the case for all subsystems that use dma. Some subsystems use a > timer to check the dma status periodically. > > Therefore the calculation was updated and residue is calculated > accordingly by a) update the residue calculation taking in > consideration the last used buffer index by using *buf_ptail* variable > and b) chn_real_count (number of bytes transferred) is initialized to > zero, when dma channel is created, to avoid using an uninitialized > value in residue calculation when dma status is checked without > waiting dma complete event. Looks to be missed earier, so applying now Thanks -- ~Vinod -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
