On Fri, 2013-12-13 at 15:16 -0700, Bjorn Helgaas wrote: > On Fri, Dec 13, 2013 at 08:23:16AM -0700, Betty Dall wrote: > > aer_hest_parse() could pass a non-AER HEST error source to the function > > hest_match_pci(). hest_match_pci() assumes that the HEST error source is > > type ACPI_HEST_TYPE_AER_ROOT_PORT, ACPI_HEST_TYPE_AER_ENDPOINT, or > > ACPI_HEST_TYPE_AER_BRIDGE. I have a platform that has some > > ACPI_HEST_TYPE_GENERIC error sources where hest_match_pci() was trying to > > access the structure as if it had the acpi_hest_aer_common fields. > > > > aer_hest_parse() is only ever interested in the AER type HEST error > > sources. Add a check on the type of the error souce at the beginning of > > aer_hest_parse(). > > > > Signed-off-by: Betty Dall <[email protected]> > > --- > > > > drivers/pci/pcie/aer/aerdrv_acpi.c | 4 ++++ > > 1 files changed, 4 insertions(+), 0 deletions(-) > > > > > > diff --git a/drivers/pci/pcie/aer/aerdrv_acpi.c > > b/drivers/pci/pcie/aer/aerdrv_acpi.c > > index cf611ab..39186e3 100644 > > --- a/drivers/pci/pcie/aer/aerdrv_acpi.c > > +++ b/drivers/pci/pcie/aer/aerdrv_acpi.c > > @@ -56,6 +56,10 @@ static int aer_hest_parse(struct acpi_hest_header > > *hest_hdr, void *data) > > struct acpi_hest_aer_common *p; > > int ff; > > > > + if (hest_hdr->type != ACPI_HEST_TYPE_AER_ROOT_PORT && > > + hest_hdr->type != ACPI_HEST_TYPE_AER_ENDPOINT && > > + hest_hdr->type != ACPI_HEST_TYPE_AER_BRIDGE) > > + return 0; > > p = (struct acpi_hest_aer_common *)(hest_hdr + 1); > > ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); > > if (p->flags & ACPI_HEST_GLOBAL) { > > Hi Betty, > > I propose the following tweaked version. Will this work for you? > > > PCI/AER: Ingore non-PCIe AER error sources in aer_hest_parse() > > From: Betty Dall <[email protected]> > > aer_set_firmware_first() searches the HEST for an error source descriptor > matching the specified PCI device. It uses the apei_hest_parse() iterator > to call aer_hest_parse() for every descriptor in the HEST. > > Previously, aer_hest_parse() incorrectly assumed every descriptor was for a > PCIe error source. This patch adds a check to avoid that error. > > [bhelgaas: factor check into helper function, changelog] > Signed-off-by: Betty Dall <[email protected]> > Signed-off-by: Bjorn Helgaas <[email protected]> > --- > drivers/pci/pcie/aer/aerdrv_acpi.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/drivers/pci/pcie/aer/aerdrv_acpi.c > b/drivers/pci/pcie/aer/aerdrv_acpi.c > index cf611ab2193a..f670313479ee 100644 > --- a/drivers/pci/pcie/aer/aerdrv_acpi.c > +++ b/drivers/pci/pcie/aer/aerdrv_acpi.c > @@ -50,12 +50,24 @@ struct aer_hest_parse_info { > int firmware_first; > }; > > +static int hest_source_is_pcie_aer(struct acpi_hest_header *hest_hdr) > +{ > + if (hest_hdr->type == ACPI_HEST_TYPE_AER_ROOT_PORT || > + hest_hdr->type == ACPI_HEST_TYPE_AER_ENDPOINT || > + hest_hdr->type == ACPI_HEST_TYPE_AER_BRIDGE) > + return 1; > + return 0; > +} > + > static int aer_hest_parse(struct acpi_hest_header *hest_hdr, void *data) > { > struct aer_hest_parse_info *info = data; > struct acpi_hest_aer_common *p; > int ff; > > + if (!hest_source_is_pcie_aer(hest_hdr)) > + return 0; > + > p = (struct acpi_hest_aer_common *)(hest_hdr + 1); > ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); > if (p->flags & ACPI_HEST_GLOBAL) {
Hi Bjorn, Yes, that is more readable code. Thanks for revising it. I tested it on my system that has non-AER error sources and it works fine. One nit is that "Ignore" is misspelled in the subject line. -Betty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
