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sparc64: Send break twice from console to return to boot prom 

Now we can also jump to boot prom from sunhv console by sending
break twice on console for both running and panicked kernel
cases.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
zero-colors
Vijay Kumar 2017-02-01 11:34:39 -08:00 committed by David S. Miller
parent 7dd4fcf5b7
commit 7db60d05e5
2 changed files with 7 additions and 2 deletions
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6
drivers/tty/serial/sunhv.c
View File

@ -116,7 +116,7 @@ static int receive_chars_getchar(struct uart_port *port)
static int receive_chars_read(struct uart_port *port)
{
int saw_console_brk = 0;
static int saw_console_brk;
int limit = 10000;
while (limit-- > 0) {
@ -128,6 +128,9 @@ static int receive_chars_read(struct uart_port *port)
bytes_read = 0;
if (stat == CON_BREAK) {
if (saw_console_brk)
sun_do_break();
if (uart_handle_break(port))
continue;
saw_console_brk = 1;
@ -151,6 +154,7 @@ static int receive_chars_read(struct uart_port *port)
if (port->sysrq != 0 && *con_read_page) {
for (i = 0; i < bytes_read; i++)
uart_handle_sysrq_char(port, con_read_page[i]);
saw_console_brk = 0;
}
if (port->state == NULL)

3
kernel/panic.c
View File

@ -273,7 +273,8 @@ void panic(const char *fmt, ...)
extern int stop_a_enabled;
/* Make sure the user can actually press Stop-A (L1-A) */
stop_a_enabled = 1;
pr_emerg("Press Stop-A (L1-A) to return to the boot prom\n");
pr_emerg("Press Stop-A (L1-A) from sun keyboard or send break\n"
"twice on console to return to the boot prom\n");
}
#endif
#if defined(CONFIG_S390)