Hey Uwe, here on a imx6sx board newly introduced DSR-irq-handling breaks serial console and network support. Reverting commit 27e16501052e5341934d3 "serial: imx: implement DSR irq handling for DTE mode" fixes the issue. The underlying cause is the RMII network configuration where register bit SION in IOMUXC_SW_MUX_CTL_PAD_ENET1_TX_CLK is necessary. But this also falsely feeds signal UART1_DTR_B and triggers DSR irq... Can we revert this commit or add a quirk for RMII-SION configs or make this optional by a device tree option? Thanks -- Christoph -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html