diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index d05e6243b4df..d245c639c222 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -310,3 +310,13 @@ Why:  The arch/powerpc tree is the merged architecture for ppc32 and ppc64
 Who:  linuxppc-dev@ozlabs.org
 
 ---------------------------
+
+What:	mthca driver's MSI support
+When:	January 2008
+Files:	drivers/infiniband/hw/mthca/*.[ch]
+Why:	All mthca hardware also supports MSI-X, which provides
+	strictly more functionality than MSI.  So there is no point in
+	having both MSI-X and MSI support in the driver.
+Who:	Roland Dreier <rolandd@cisco.com>
+
+---------------------------
diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c
index aa563e61de65..7ea6713afea8 100644
--- a/drivers/infiniband/hw/mthca/mthca_main.c
+++ b/drivers/infiniband/hw/mthca/mthca_main.c
@@ -67,7 +67,7 @@ MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
 
 static int msi = 0;
 module_param(msi, int, 0444);
-MODULE_PARM_DESC(msi, "attempt to use MSI if nonzero");
+MODULE_PARM_DESC(msi, "attempt to use MSI if nonzero (deprecated, use MSI-X instead)");
 
 #else /* CONFIG_PCI_MSI */
 
@@ -1117,9 +1117,21 @@ static int __mthca_init_one(struct pci_dev *pdev, int hca_type)
 
 	if (msi_x && !mthca_enable_msi_x(mdev))
 		mdev->mthca_flags |= MTHCA_FLAG_MSI_X;
-	if (msi && !(mdev->mthca_flags & MTHCA_FLAG_MSI_X) &&
-	    !pci_enable_msi(pdev))
-		mdev->mthca_flags |= MTHCA_FLAG_MSI;
+	else if (msi) {
+		static int warned;
+
+		if (!warned) {
+			printk(KERN_WARNING PFX "WARNING: MSI support will be "
+			       "removed from the ib_mthca driver in January 2008.\n");
+			printk(KERN_WARNING "    If you are using MSI and cannot "
+			       "switch to MSI-X, please tell "
+			       "<general@lists.openfabrics.org>.\n");
+			++warned;
+		}
+
+		if (!pci_enable_msi(pdev))
+			mdev->mthca_flags |= MTHCA_FLAG_MSI;
+	}
 
 	if (mthca_cmd_init(mdev)) {
 		mthca_err(mdev, "Failed to init command interface, aborting.\n");