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xen/acpi: Workaround broken BIOSes exporting non-existing C-states.

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We did a similar check for the P-states but did not do it for
the C-states. What we want to do is ignore cases where the DSDT
has definition for sixteen CPUs, but the machine only has eight
CPUs and we get:
xen-acpi-processor: (CX): Hypervisor error (-22) for ACPI CPU14

Reported-by: Tobias Geiger <tobias.geiger@vido.info>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2012-04-26 14:22:33 -04:00
parent cf405ae612
commit b930fe5e1f
1 changed files with 4 additions and 1 deletions
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5
drivers/xen/xen-acpi-processor.c
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@ -128,7 +128,10 @@ 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
} else if (ret != -EINVAL)
/* EINVAL means the ACPI ID is incorrect - meaning the ACPI
* table is referencing a non-existing CPU - which can happen
* with broken ACPI tables. */
pr_err(DRV_NAME "(CX): Hypervisor error (%d) for ACPI CPU%u\n",
ret, _pr->acpi_id);