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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-04-26 14:22:33 -0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-04-26 22:07:28 -0400
commitb930fe5e1f5646e071facda70b25b137ebeae5af (patch)
tree4f7bc16244bc7b95867ac1b72ca021bfc8b31ba4 /drivers/xen
parentcf405ae612b0f7e2358db7ff594c0e94846137aa (diff)
downloadlinux-linaro-stable-b930fe5e1f5646e071facda70b25b137ebeae5af.tar.gz
xen/acpi: Workaround broken BIOSes exporting non-existing C-states.
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>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/xen-acpi-processor.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
index 174b5653cd8a..0b48579a9cd6 100644
--- a/drivers/xen/xen-acpi-processor.c
+++ b/drivers/xen/xen-acpi-processor.c
@@ -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);