On Tue, Dec 06, 2022 at 04:13:35PM -0600, Bjorn Helgaas wrote: > On Wed, Sep 28, 2022 at 06:59:41PM +0800, Zhuo Chen wrote: > > lpfc_aer_cleanup_state() requires clearing both fatal and non-fatal > > uncorrectable error status. > > I don't know what the point of lpfc_aer_cleanup_state() is. AER > errors should be handled and cleared by the PCI core, not by > individual drivers. Only lpfc, liquidio, and sky2 touch > PCI_ERR_UNCOR_STATUS. > > But lpfc_aer_cleanup_state() is visible in the > "lpfc_aer_state_cleanup" sysfs file, so removing it would break any > userspace that uses it. > > If we can rely on the PCI core to clean up AER errors itself > (admittedly, that might be a big "if"), maybe lpfc_aer_cleanup_state() > could just become a no-op? > > Any comment from the LPFC folks? > > Ideally, I would rather not export pci_aer_clear_nonfatal_status() or > pci_aer_clear_uncorrect_error_status() outside the PCI core at all. Resurrecting this old thread. Zhuo, can you figure out where the PCI core clears these errors, include that in the commit log, and propose a patch that makes lpfc_aer_cleanup_state() a no-op, by removing the pci_aer_clear_nonfatal_status() call completely? Such a patch could be sent to the SCSI maintainers since it doesn't involve the PCI core. If it turns out that the PCI core *doesn't* clear these errors, we should figure out *why* it doesn't and try to change the PCI core so it does. > > But using pci_aer_clear_nonfatal_status() > > will only clear non-fatal error status. To clear both fatal and > > non-fatal error status, use pci_aer_clear_uncorrect_error_status(). > > > > Signed-off-by: Zhuo Chen <chenzhuo.1@xxxxxxxxxxxxx> > > --- > > drivers/scsi/lpfc/lpfc_attr.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c > > index 09cf2cd0ae60..d835cc0ba153 100644 > > --- a/drivers/scsi/lpfc/lpfc_attr.c > > +++ b/drivers/scsi/lpfc/lpfc_attr.c > > @@ -4689,7 +4689,7 @@ static DEVICE_ATTR_RW(lpfc_aer_support); > > * Description: > > * If the @buf contains 1 and the device currently has the AER support > > * enabled, then invokes the kernel AER helper routine > > - * pci_aer_clear_nonfatal_status() to clean up the uncorrectable > > + * pci_aer_clear_uncorrect_error_status() to clean up the uncorrectable > > * error status register. > > * > > * Notes: > > @@ -4715,7 +4715,7 @@ lpfc_aer_cleanup_state(struct device *dev, struct device_attribute *attr, > > return -EINVAL; > > > > if (phba->hba_flag & HBA_AER_ENABLED) > > - rc = pci_aer_clear_nonfatal_status(phba->pcidev); > > + rc = pci_aer_clear_uncorrect_error_status(phba->pcidev); > > > > if (rc == 0) > > return strlen(buf); > > -- > > 2.30.1 (Apple Git-130) > >
