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-rw-r--r--drivers/infiniband/hw/mthca/mthca_main.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c
index 0dc5b8da000..7e9c97b0940 100644
--- a/drivers/infiniband/hw/mthca/mthca_main.c
+++ b/drivers/infiniband/hw/mthca/mthca_main.c
@@ -77,6 +77,10 @@ MODULE_PARM_DESC(msi, "attempt to use MSI if nonzero");
#endif /* CONFIG_PCI_MSI */
+static int tune_pci = 0;
+module_param(tune_pci, int, 0444);
+MODULE_PARM_DESC(tune_pci, "increase PCI burst from the default set by BIOS if nonzero");
+
static const char mthca_version[] __devinitdata =
DRV_NAME ": Mellanox InfiniBand HCA driver v"
DRV_VERSION " (" DRV_RELDATE ")\n";
@@ -98,6 +102,9 @@ static int __devinit mthca_tune_pci(struct mthca_dev *mdev)
int cap;
u16 val;
+ if (!tune_pci)
+ return 0;
+
/* First try to max out Read Byte Count */
cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX);
if (cap) {