Message ID | 1450896933-192269-1-git-send-email-vijay.ac.kumar@oracle.com |
---|---|
State | Accepted |
Delegated to: | David Miller |
Headers | show |
From: Vijay Kumar <vijay.ac.kumar@oracle.com> Date: Wed, 23 Dec 2015 10:55:33 -0800 > When sysrq is triggered from console, serial driver for SUN hypervisor > console receives a console break and enables the sysrq. It expects a valid > sysrq char following with break. Meanwhile if driver receives 'NULL' > ASCII char then it disables sysrq and sysrq handler will never be invoked. > > This fix skips calling uart sysrq handler when 'NULL' is received while > sysrq is enabled. > > Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com> > Acked-by: Karl Volz <karl.volz@oracle.com> Applied, thank you. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c index 0640318..163ae5d 100644 --- a/drivers/tty/serial/sunhv.c +++ b/drivers/tty/serial/sunhv.c @@ -148,8 +148,10 @@ static int receive_chars_read(struct uart_port *port) uart_handle_dcd_change(port, 1); } - for (i = 0; i < bytes_read; i++) - uart_handle_sysrq_char(port, con_read_page[i]); + if (port->sysrq != 0 && *con_read_page) { + for (i = 0; i < bytes_read; i++) + uart_handle_sysrq_char(port, con_read_page[i]); + } if (port->state == NULL) continue;