mbox series

[0/1,SRU,Bionic] Remove false errors "AE_NOT_FOUND, Evaluating _PRS"

Message ID 1527478042-537-1-git-send-email-alex.hung@canonical.com
Headers show
Series Remove false errors "AE_NOT_FOUND, Evaluating _PRS" | expand

Message

Alex Hung May 28, 2018, 3:27 a.m. UTC 
BugLink: https://bugs.launchpad.net/bugs/1773295

[Impact]

  Kernel generates false errors "ACPI Exception: AE_NOT_FOUND, Evaluating _PRS"
  as new platforms do not have _PRS control method when OS is not allowed to 
  modify hardware registers for routing table.

[Fix]

  The patch disables the error messages by default for users who do not need 
  to debug _PRS methods.

  The patches are included in upstream and are cherry-picked from Linus's repo.

[Regression potential]

  No regression for older systems as they have _PRS methods, and new systems 
  will see pci_link driver loaded but there should be no functional changes.

Alex Hung (1):
  ACPI / PCI: pci_link: Allow the absence of _PRS and change log level

 drivers/acpi/pci_link.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Khalid Elmously June 6, 2018, 11:53 p.m. UTC | #1 
Applied to Bionic


On 2018-05-27 20:27:21 , Alex Hung wrote:
> BugLink: https://bugs.launchpad.net/bugs/1773295
> 
> [Impact]
> 
>   Kernel generates false errors "ACPI Exception: AE_NOT_FOUND, Evaluating _PRS"
>   as new platforms do not have _PRS control method when OS is not allowed to 
>   modify hardware registers for routing table.
> 
> [Fix]
> 
>   The patch disables the error messages by default for users who do not need 
>   to debug _PRS methods.
> 
>   The patches are included in upstream and are cherry-picked from Linus's repo.
> 
> [Regression potential]
> 
>   No regression for older systems as they have _PRS methods, and new systems 
>   will see pci_link driver loaded but there should be no functional changes.
> 
> Alex Hung (1):
>   ACPI / PCI: pci_link: Allow the absence of _PRS and change log level
> 
>  drivers/acpi/pci_link.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> -- 
> 2.17.0
> 
> 
> -- 
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