This is a respin of an earlier patch[1] that enabled a workaround via Kconfig for an errata issue when using BRK on FSL 16550 UARTs. In this version, the 8250 specific bug field is moved to the generic uart_port struct, since hardware bugs aren't the unique domain of just the 8250 class of uarts. Then the ability to set a known bugs value via the platform_device entry point is added, so that it can be set externally vs. requiring some sort of autodetection from the actual driver(s). Then, the FSL errata fix is added to 8250.c by using the above support. An entry in a DTS file is used to flag boards/platforms with the issue. It is also added in a way that is optimized away for other architectures. Kumar has a patch pending[2] that updates all the dts files. I've not included it here, so that review focus can be on the implementation. I've re-tested it on an sbc8641D, where sysrq was useless before; with this fix, it works as expected. Thanks, Paul. [1] http://patchwork.ozlabs.org/patch/46609/ [2] http://patchwork.ozlabs.org/patch/128070/ -------- Paul Gortmaker (3): serial: make bugs field not specific to 8250 type uarts. serial: allow passing in hardware bug info via platform device 8250: add workaround for MPC8[356]xx UART break IRQ storm arch/powerpc/kernel/legacy_serial.c | 11 ++++++++++ drivers/tty/serial/8250.c | 37 +++++++++++++++++++++------------- drivers/tty/serial/8250.h | 5 ---- include/linux/serial_8250.h | 11 ++++++++++ include/linux/serial_core.h | 1 + 5 files changed, 46 insertions(+), 19 deletions(-) -- 1.7.7 -- 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
