TononixOS/ubports_kernel_google_msm
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panic: resume console if panic after console suspend.

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Device rebooted by kernel panic but no panic message.
This helps to get the panic messages in this case.

Bug: 10184128
Change-Id: I24545b1ce2f9e3e239795089d8564c2cc5f89fe7
Signed-off-by: shihhao.feng <shihhao.feng@lge.com>
Signed-off-by: Devin Kim <dojip.kim@lge.com>
This commit is contained in:
Devin Kim
2013-09-09 13:01:19 -07:00
committed by Ed Tam
parent eff211bddf
commit 03053d709b
3 changed files with 12 additions and 0 deletions
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1
include/linux/console.h
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@@ -153,6 +153,7 @@ extern int braille_register_console(struct console *, int index,
extern int braille_unregister_console(struct console *); extern int braille_unregister_console(struct console *);
extern void console_sysfs_notify(void); extern void console_sysfs_notify(void);
extern bool console_suspend_enabled; extern bool console_suspend_enabled;
extern int is_console_suspended(void);
/* Suspend and resume console messages over PM events */ /* Suspend and resume console messages over PM events */
extern void suspend_console(void); extern void suspend_console(void);

5
kernel/panic.c
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@@ -24,6 +24,7 @@
#include <linux/nmi.h> #include <linux/nmi.h>
#include <linux/dmi.h> #include <linux/dmi.h>
#include <linux/coresight.h> #include <linux/coresight.h>
#include <linux/console.h>
#define PANIC_TIMER_STEP 100 #define PANIC_TIMER_STEP 100
#define PANIC_BLINK_SPD 18 #define PANIC_BLINK_SPD 18
@@ -133,6 +134,10 @@ void panic(const char *fmt, ...)
kmsg_dump(KMSG_DUMP_PANIC); kmsg_dump(KMSG_DUMP_PANIC);
/* print last_kmsg even after console suspend */
if (is_console_suspended())
resume_console();
/* /*
* Note smp_send_stop is the usual smp shutdown function, which * Note smp_send_stop is the usual smp shutdown function, which
* unfortunately means it may not be hardened to work in a panic * unfortunately means it may not be hardened to work in a panic

6
kernel/printk.c
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@@ -1188,6 +1188,12 @@ module_param_named(console_suspend, console_suspend_enabled,
MODULE_PARM_DESC(console_suspend, "suspend console during suspend" MODULE_PARM_DESC(console_suspend, "suspend console during suspend"
" and hibernate operations"); " and hibernate operations");
/* check current suspend/resume status of the console */
int is_console_suspended(void)
{
return console_suspended;
}
/** /**
* suspend_console - suspend the console subsystem * suspend_console - suspend the console subsystem
* *