From 2553e32ae200210801dd3e3f58dd23169356c9d6 Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Sat, 16 Mar 2013 11:46:45 +0530 Subject: memory: emif: use restart if power_off not present when out of spec Some machine or kernel variants might have missed implementation of power off handlers. We DONOT want to let the system be in "out of spec" state in this condition. So, WARN and attempt a machine restart in the hopes of clearing the out-of-spec temperature condition. NOTE: This is not the safest option, but safer than leaving the system in unstable conditions. Signed-off-by: Nishanth Menon Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers/memory') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index 96add5b..b2bb272 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include "emif.h" #include "of_memory.h" @@ -1015,7 +1016,14 @@ static irqreturn_t emif_threaded_isr(int irq, void *dev_id) if (emif->temperature_level == SDRAM_TEMP_VERY_HIGH_SHUTDOWN) { dev_emerg(emif->dev, "SDRAM temperature exceeds operating limit.. Needs shut down!!!\n"); - kernel_power_off(); + + /* If we have Power OFF ability, use it, else try restarting */ + if (pm_power_off) { + kernel_power_off(); + } else { + WARN(1, "FIXME: NO pm_power_off!!! trying restart\n"); + kernel_restart("SDRAM Over-temp Emergency restart"); + } return IRQ_HANDLED; } -- cgit v1.1