This is following what 8250 driver is doing in console write function, to avoid the hardware lockup case. v2: incldudes the <linux/nmi.h> Signed-off-by: Feng Tang <feng.tang@xxxxxxxxx> Acked-by: Alan Cox <alan@xxxxxxxxxxxxxxx> --- drivers/tty/serial/mfd.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/tty/serial/mfd.c b/drivers/tty/serial/mfd.c index c4b50af..79fe59b 100644 --- a/drivers/tty/serial/mfd.c +++ b/drivers/tty/serial/mfd.c @@ -36,6 +36,7 @@ #include <linux/serial_mfd.h> #include <linux/dma-mapping.h> #include <linux/pci.h> +#include <linux/nmi.h> #include <linux/io.h> #include <linux/debugfs.h> #include <linux/pm_runtime.h> @@ -1113,6 +1114,8 @@ serial_hsu_console_write(struct console *co, const char *s, unsigned int count) unsigned int ier; int locked = 1; + touch_nmi_watchdog(); + local_irq_save(flags); if (up->port.sysrq) locked = 0; -- 1.7.9.5 -- 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
