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authorTAMUKI Shoichi <tamuki@linet.gr.jp>2010-08-10 18:03:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 08:59:22 -0700
commitc7ff0d9c92435e836e13aaa8d0e56d4000424bcc (patch)
tree96f56d15b5dd96c44fb183ce00152608df50dc5c /arch/arm/mach-s3c2440/mach-gta02.c
parentbebf8cfaea1df1a104b993b995bb385e998a4dc8 (diff)
downloadop-kernel-dev-c7ff0d9c92435e836e13aaa8d0e56d4000424bcc.zip
op-kernel-dev-c7ff0d9c92435e836e13aaa8d0e56d4000424bcc.tar.gz
panic: keep blinking in spite of long spin timer mode
To keep panic_timeout accuracy when running under a hypervisor, the current implementation only spins on long time (1 second) calls to mdelay. That brings a good effect, but the problem is the keyboard LEDs don't blink at all on that situation. This patch changes to call to panic_blink_enter() between every mdelay and keeps blinking in spite of long spin timer mode. The time to call to mdelay is now 100ms. Even this change will keep panic_timeout accuracy enough when running under a hypervisor. Signed-off-by: TAMUKI Shoichi <tamuki@linet.gr.jp> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Dmitry Torokhov <dtor@mail.ru> Cc: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/mach-s3c2440/mach-gta02.c')
-rw-r--r--arch/arm/mach-s3c2440/mach-gta02.c17
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
index 9e39faa..deaabe8 100644
--- a/arch/arm/mach-s3c2440/mach-gta02.c
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
@@ -90,24 +90,17 @@
static struct pcf50633 *gta02_pcf;
/*
- * This gets called every 1ms when we paniced.
+ * This gets called frequently when we paniced.
*/
-static long gta02_panic_blink(long count)
+static long gta02_panic_blink(int state)
{
long delay = 0;
- static long last_blink;
- static char led;
+ char led;
- /* Fast blink: 200ms period. */
- if (count - last_blink < 100)
- return 0;
-
- led ^= 1;
+ led = (state) ? 1 : 0;
gpio_direction_output(GTA02_GPIO_AUX_LED, led);
- last_blink = count;
-
return delay;
}
@@ -556,7 +549,7 @@ static void gta02_poweroff(void)
static void __init gta02_machine_init(void)
{
- /* Set the panic callback to make AUX LED blink at ~5Hz. */
+ /* Set the panic callback to turn AUX LED on or off. */
panic_blink = gta02_panic_blink;
s3c_pm_init();
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