On Monday 11 March 2013 10:36 AM, Lokesh Vutla wrote:
> From: Nishanth Menon <nm@xxxxxx>
>
> 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 <nm@xxxxxx>
> Signed-off-by: Lokesh Vutla <lokeshvutla@xxxxxx>
> ---
> drivers/memory/emif.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c
> index 927fb55..02a94fc 100644
> --- a/drivers/memory/emif.c
> +++ b/drivers/memory/emif.c
> @@ -25,6 +25,7 @@
> #include <linux/module.h>
> #include <linux/list.h>
> #include <linux/spinlock.h>
> +#include <linux/pm.h>
> #include <memory/jedec_ddr.h>
> #include "emif.h"
> #include "of_memory.h"
> @@ -1011,7 +1012,13 @@ 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();
Extra line here would be good here.
> + /* 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;
> }
>
Otherwise,
Acked-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
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