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SubjectRe: [PATCH v17 09/12] PCI/AER: Allow clearing Error Status Register in FF mode
On Thu, Mar 05, 2020 at 09:45:46PM -0800, Kuppuswamy, Sathyanarayanan wrote:
> On 3/3/2020 6:36 PM, sathyanarayanan.kuppuswamy@linux.intel.com wrote:
> > From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> >
> > As per PCI firmware specification r3.2 System Firmware Intermediary
> > (SFI) _OSC and DPC Updates ECR
> > (https://members.pcisig.com/wg/PCI-SIG/document/13563), sec titled "DPC
> > Event Handling Implementation Note", page 10, Error Disconnect Recover
> > (EDR) support allows OS to handle error recovery and clearing Error
> > Registers even in FF mode. So create new API pci_aer_raw_clear_status()
> > which allows clearing AER registers without FF mode checks.
> >
> > Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> > ---
> > drivers/pci/pci.h | 2 ++
> > drivers/pci/pcie/aer.c | 22 ++++++++++++++++++----
> > 2 files changed, 20 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> > index e57e78b619f8..c239e6dd2542 100644
> > --- a/drivers/pci/pci.h
> > +++ b/drivers/pci/pci.h
> > @@ -655,6 +655,7 @@ extern const struct attribute_group aer_stats_attr_group;
> > void pci_aer_clear_fatal_status(struct pci_dev *dev);
> > void pci_aer_clear_device_status(struct pci_dev *dev);
> > int pci_cleanup_aer_error_status_regs(struct pci_dev *dev);
> > +int pci_aer_raw_clear_status(struct pci_dev *dev);
> > #else
> > static inline void pci_no_aer(void) { }
> > static inline void pci_aer_init(struct pci_dev *d) { }
> > @@ -665,6 +666,7 @@ static inline int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
> > {
> > return -EINVAL;
> > }
> > +int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; }

> It's missing static specifier. It needs to be fixed. I can fix it in
> next version. Bjorn, if there is no need for next version, can you
> please make this change?

pci_aer_raw_clear_status() is defined in aer.c and called from aer.c
and edr.c, so I do not think it can be static. Am I missing
something?

I have a review/edr branch that I hope becomes what will be applied.

Bjorn

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