myri10ge: add a wc_enabled flag to myri10ge_priv

Add a wc_enabled flag in the myri10ge_priv instead of relying
on mtrr >= 0.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 68fd38b291fd..ac02b3b60f92 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -181,6 +181,7 @@ struct myri10ge_priv {
         int intr_coal_delay;
         __be32 __iomem *intr_coal_delay_ptr;
         int mtrr;
+        int wc_enabled;
         int wake_queue;
         int stop_queue;
         int down_cnt;
@@ -1385,7 +1386,7 @@ myri10ge_get_ethtool_stats(struct net_device *netdev,
                 data[i] = ((unsigned long *)&mgp->stats)[i];
 
         data[i++] = (unsigned int)mgp->tx.boundary;
-        data[i++] = (unsigned int)(mgp->mtrr >= 0);
+        data[i++] = (unsigned int)mgp->wc_enabled;
         data[i++] = (unsigned int)mgp->pdev->irq;
         data[i++] = (unsigned int)mgp->msi_enabled;
         data[i++] = (unsigned int)mgp->read_dma;
@@ -1749,7 +1750,7 @@ static int myri10ge_open(struct net_device *dev)
                 goto abort_with_irq;
         }
 
-        if (myri10ge_wcfifo && mgp->mtrr >= 0) {
+        if (myri10ge_wcfifo && mgp->wc_enabled) {
                 mgp->tx.wc_fifo = (u8 __iomem *) mgp->sram + MXGEFW_ETH_SEND_4;
                 mgp->rx_small.wc_fifo =
                     (u8 __iomem *) mgp->sram + MXGEFW_ETH_RECV_SMALL;
@@ -2850,9 +2851,12 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         mgp->board_span = pci_resource_len(pdev, 0);
         mgp->iomem_base = pci_resource_start(pdev, 0);
         mgp->mtrr = -1;
+        mgp->wc_enabled = 0;
 #ifdef CONFIG_MTRR
         mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
                              MTRR_TYPE_WRCOMB, 1);
+        if (mgp->mtrr >= 0)
+                mgp->wc_enabled = 1;
 #endif
         /* Hack.  need to get rid of these magic numbers */
         mgp->sram_size =
@@ -2947,7 +2951,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
                  (mgp->msi_enabled ? "MSI" : "xPIC"),
                  netdev->irq, mgp->tx.boundary, mgp->fw_name,
-                 (mgp->mtrr >= 0 ? "Enabled" : "Disabled"));
+                 (mgp->wc_enabled ? "Enabled" : "Disabled"));
 
         return 0;