On Friday, December 12, 2014 03:42:07 PM Rafael J. Wysocki wrote:
> On Thursday, December 11, 2014 07:59:20 PM Linus Torvalds wrote:
> > On Mon, Dec 8, 2014 at 4:21 PM, Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
> > >
> > > Also the ACPI core is now going to support the _DEP configuration
> > > information in a limited way.
> >
> > Hmm. That seems to be the cause of this annoying new message:
> >
> > ...
> > ACPI: Using IOAPIC for interrupt routing
> > PCI: Using host bridge windows from ACPI; if necessary, use
> > "pci=nocrs" and report a bug
> > ACPI: [Package] has zero elements (ffff88040ccdb200)
> > acpi LNXCPU:00: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb200)
> > acpi LNXCPU:01: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb200)
> > acpi LNXCPU:02: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb200)
> > acpi LNXCPU:03: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb200)
> > acpi LNXCPU:04: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb200)
> > acpi LNXCPU:05: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb200)
> > acpi LNXCPU:06: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb200)
> > acpi LNXCPU:07: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb840)
> > acpi device:27: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb840)
> > acpi device:3f: Failed to evaluate _DEP.
> > ACPI: [Package] has zero elements (ffff88040ccdb8c0)
> > acpi LNXVIDEO:00: Failed to evaluate _DEP.
> > ACPI: Power Resource [FN00] (off)
> > ...
> >
> > which doesn't seem to hinder anything from working, but is extremely
> > annoying because it's printed out as some super-important "KERN_ERR
> > message of Doom!"
> >
> > I don't see why incomplete ACPI tables would *ever* be "KERN_ERR"
> > level messages, but I particularly don't see it when it seems to be
> > our own meaningless fake entries.
>
> Right the KERN_ERR level in there is silly. Overlooked in review, sorry
> about that. The patch below should take care of it.
>
> Some of the messages you're seeing are from acpi_evaluate_reference(),
> though, and are not really useful too. I'll cut a separate patch for
> these.
This:
---
From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Subject: ACPI / utils: Drop error messages from acpi_evaluate_reference()
Some of the error messages printed by acpi_evaluate_reference()
with the KERN_ERR priority should really be debug messages, but then
they would be redundant, because acpi_util_eval_error() is called
too at the same spots (except for one).
Drop the kernel messages from there entirely and leave the
acpi_util_eval_error() to take care of the debug printing. In one case,
replace the kernel message with a call to acpi_util_eval_error().
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/acpi/utils.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
Index: linux-pm/drivers/acpi/utils.c
===================================================================
--- linux-pm.orig/drivers/acpi/utils.c
+++ linux-pm/drivers/acpi/utils.c
@@ -346,22 +346,16 @@ acpi_evaluate_reference(acpi_handle hand
package = buffer.pointer;
if ((buffer.length == 0) || !package) {
- printk(KERN_ERR PREFIX "No return object (len %X ptr %p)\n",
- (unsigned)buffer.length, package);
status = AE_BAD_DATA;
acpi_util_eval_error(handle, pathname, status);
goto end;
}
if (package->type != ACPI_TYPE_PACKAGE) {
- printk(KERN_ERR PREFIX "Expecting a [Package], found type %X\n",
- package->type);
status = AE_BAD_DATA;
acpi_util_eval_error(handle, pathname, status);
goto end;
}
if (!package->package.count) {
- printk(KERN_ERR PREFIX "[Package] has zero elements (%p)\n",
- package);
status = AE_BAD_DATA;
acpi_util_eval_error(handle, pathname, status);
goto end;
@@ -380,17 +374,13 @@ acpi_evaluate_reference(acpi_handle hand
if (element->type != ACPI_TYPE_LOCAL_REFERENCE) {
status = AE_BAD_DATA;
- printk(KERN_ERR PREFIX
- "Expecting a [Reference] package element, found type %X\n",
- element->type);
acpi_util_eval_error(handle, pathname, status);
break;
}
if (!element->reference.handle) {
- printk(KERN_WARNING PREFIX "Invalid reference in"
- " package %s\n", pathname);
status = AE_NULL_ENTRY;
+ acpi_util_eval_error(handle, pathname, status);
break;
}
/* Get the acpi_handle. */
--
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