Re: [Xen-devel] Early ACPI events prevent subsequent ACPI functionality on xen 4.3 + HVM domU

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

> diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
> index 412b96c..34f967f 100644
> --- a/drivers/xen/manage.c
> +++ b/drivers/xen/manage.c
> @@ -194,7 +194,6 @@ static void do_reboot(void)
>       shutting_down = SHUTDOWN_POWEROFF; /* ? */
>       ctrl_alt_del();
>  }
> -
>  static void shutdown_handler(struct xenbus_watch *watch,
>                            const char **vec, unsigned int len)
>  {
> @@ -252,6 +251,10 @@ static void shutdown_handler(struct xenbus_watch *watch,
>       kfree(str);
>  }
>  
> +static void check_shutdown_handler(void)
> +{
> +      shutdown_handler(NULL, NULL, 0);
> +}
>  #ifdef CONFIG_MAGIC_SYSRQ
>  static void sysrq_handler(struct xenbus_watch *watch, const char **vec,
>                         unsigned int len)
> @@ -310,7 +313,7 @@ static int setup_shutdown_watcher(void)
>               return err;
>       }
>  #endif
> -
> +     check_shutdown_handler();

If this is necessary then there is a bug in the kernel's watch handling,
for which this is just a workaround, since the call to
register_xenbus_watch should have triggered an initial watch.



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