Hello! Bartlomiej, could you please tell what uart driver is used on Samsung Exynos4412? Dinh, could you please tell what uart driver is used on SoCFPGA? Could you make two test? 1) Checkout tree at commit 848e9776fee4 "dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit", make it buildable and see is it works. In order to make in buildable remove bursts argument from the line: if (*bursts == 1) - return _bursts(pl330, dry_run, buf, pxs, 1); + return _bursts(dry_run, buf, pxs, 1); 2) Checkout next-20160211 kernel tree and set src_maxburst and dst_maxburst to 1 inside UART driver to see is it works? Regards, Alexander. -- 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