Re: [PATCH] xen-acpi-processor: Don't display errors when we get -ENOSYS

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 25/04/14 16:10, Konrad Rzeszutek Wilk wrote:
> which is a perfectly legal error. This can be triggered if the
> user has booted Xen with the no-cpuidle parameter.
>
> Reported-by-and-Tested-by: Don Slutz <dslutz@verizon.com>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> ---

It would be more appropriate for Xen to return -ENODEV if it understands
the ACPI hypercalls, but can't do anything with them.

That cat is however out of the bag.

~Andrew

>  drivers/xen/xen-acpi-processor.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
> index 82358d1..59fc190 100644
> --- a/drivers/xen/xen-acpi-processor.c
> +++ b/drivers/xen/xen-acpi-processor.c
> @@ -127,7 +127,7 @@ static int push_cxx_to_hypervisor(struct acpi_processor *_pr)
>  			pr_debug("     C%d: %s %d uS\n",
>  				 cx->type, cx->desc, (u32)cx->latency);
>  		}
> -	} else if (ret != -EINVAL)
> +	} else if ((ret != -EINVAL) && (ret != -ENOSYS))
>  		/* EINVAL means the ACPI ID is incorrect - meaning the ACPI
>  		 * table is referencing a non-existing CPU - which can happen
>  		 * with broken ACPI tables. */
> @@ -259,7 +259,7 @@ static int push_pxx_to_hypervisor(struct acpi_processor *_pr)
>  			(u32) perf->states[i].power,
>  			(u32) perf->states[i].transition_latency);
>  		}
> -	} else if (ret != -EINVAL)
> +	} else if ((ret != -EINVAL) && (ret != -ENOSYS))
>  		/* EINVAL means the ACPI ID is incorrect - meaning the ACPI
>  		 * table is referencing a non-existing CPU - which can happen
>  		 * with broken ACPI tables. */