ioat/dca: Update DCA BIOS workarounds to use TAINT_FIRMWARE_WORKAROUND

This patch is meant to be a follow-up for a patch originally submitted under
the title "ioat: Do not enable DCA if tag map is invalid".  It was brought to
my attention that the preferred approach for BIOS workarounds is to set the
taint flag for TAINT_FIRMWARE_WORKAROUND for systems that require BIOS
workarounds.

This change makes it so that the DCA workarounds for broken BIOSes will now
use WARN_TAINT_ONCE(1, TAINT_FIRMWARE_WORKAROUND, ...) instead of just
printing a message via dev_err.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/dma/ioat/dca.c b/drivers/dma/ioat/dca.c
index 9b041858d10d..9e84d5bc9307 100644
--- a/drivers/dma/ioat/dca.c
+++ b/drivers/dma/ioat/dca.c
@@ -470,8 +470,10 @@ struct dca_provider *ioat2_dca_init(struct pci_dev *pdev, void __iomem *iobase)
         }
 
         if (!dca2_tag_map_valid(ioatdca->tag_map)) {
-                dev_err(&pdev->dev, "APICID_TAG_MAP set incorrectly by BIOS, "
-                        "disabling DCA\n");
+                WARN_TAINT_ONCE(1, TAINT_FIRMWARE_WORKAROUND,
+                                "%s %s: APICID_TAG_MAP set incorrectly by BIOS, disabling DCA\n",
+                                dev_driver_string(&pdev->dev),
+                                dev_name(&pdev->dev));
                 free_dca_provider(dca);
                 return NULL;
         }
@@ -689,7 +691,10 @@ struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase)
         }
 
         if (dca3_tag_map_invalid(ioatdca->tag_map)) {
-                dev_err(&pdev->dev, "APICID_TAG_MAP set incorrectly by BIOS, disabling DCA\n");
+                WARN_TAINT_ONCE(1, TAINT_FIRMWARE_WORKAROUND,
+                                "%s %s: APICID_TAG_MAP set incorrectly by BIOS, disabling DCA\n",
+                                dev_driver_string(&pdev->dev),
+                                dev_name(&pdev->dev));
                 free_dca_provider(dca);
                 return NULL;
         }