On Fri, 2018-07-27 at 09:04 -0700, Dave Jiang wrote: > When the ACPI UC error notifier gets called and ARS_REQ bit is set > with the passed in flag, we can receive -EBUSY if ARS_REQ bit is already > set for the nfit_spa->ars_state. When that happens, the ARS request is > dropped. That can potentially cause us to miss the unreported errors that > the on going ARS request does not receive. Add an ARS_REQ_REDO state that > will request short ARS upon ARS completion to grab any errors we missed. > > Signed-off-by: Dave Jiang <[email protected]> > --- > drivers/acpi/nfit/core.c | 12 +++++++++--- > drivers/acpi/nfit/nfit.h | 1 + > 2 files changed, 10 insertions(+), 3 deletions(-)
Looks good to me, you can add: Reviewed-by: Vishal Verma <[email protected]> > > diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c > index 274f636cd3d2..def64259f9a7 100644 > --- a/drivers/acpi/nfit/core.c > +++ b/drivers/acpi/nfit/core.c > @@ -2567,7 +2567,12 @@ static void ars_complete(struct acpi_nfit_desc > *acpi_desc, > test_bit(ARS_SHORT, &nfit_spa->ars_state) > ? "short" : "long"); > clear_bit(ARS_SHORT, &nfit_spa->ars_state); > - set_bit(ARS_DONE, &nfit_spa->ars_state); > + if (test_and_clear_bit(ARS_REQ_REDO, &nfit_spa->ars_state)) { > + set_bit(ARS_SHORT, &nfit_spa->ars_state); > + set_bit(ARS_REQ, &nfit_spa->ars_state); > + dev_dbg(dev, "ARS: processing scrub request received while in > progress\n"); > + } else > + set_bit(ARS_DONE, &nfit_spa->ars_state); > } > > static int ars_status_process_records(struct acpi_nfit_desc *acpi_desc) > @@ -3264,9 +3269,10 @@ int acpi_nfit_ars_rescan(struct acpi_nfit_desc > *acpi_desc, unsigned long flags) > if (test_bit(ARS_FAILED, &nfit_spa->ars_state)) > continue; > > - if (test_and_set_bit(ARS_REQ, &nfit_spa->ars_state)) > + if (test_and_set_bit(ARS_REQ, &nfit_spa->ars_state)) { > busy++; > - else { > + set_bit(ARS_REQ_REDO, &nfit_spa->ars_state); > + } else { > if (test_bit(ARS_SHORT, &flags)) > set_bit(ARS_SHORT, &nfit_spa->ars_state); > scheduled++; > diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h > index a97ff42fe311..d1274ea2d251 100644 > --- a/drivers/acpi/nfit/nfit.h > +++ b/drivers/acpi/nfit/nfit.h > @@ -119,6 +119,7 @@ enum nfit_dimm_notifiers { > > enum nfit_ars_state { > ARS_REQ, > + ARS_REQ_REDO, > ARS_DONE, > ARS_SHORT, > ARS_FAILED, > _______________________________________________ Linux-nvdimm mailing list [email protected] https://lists.01.org/mailman/listinfo/linux-nvdimm
