[Xen-devel] [PATCH v1 12/47] IB/qib: use arch_phys_wc_add()

["Luis R. Rodriguez" <mcgrof@xxxxxxxxxxxxxxxx>]

From: "Luis R. Rodriguez" <mcgrof@xxxxxxxx>

This driver already makes use of ioremap_wc() on PIO buffers,
so convert it to use arch_phys_wc_add().

Cc: Rickard Strandqvist <rickard_strandqvist@xxxxxxxxxxxxxxxxxx>
Cc: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>
Cc: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
Cc: Roland Dreier <roland@xxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Antonino Daplas <adaplas@xxxxxxxxx>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@xxxxxxxxxxxx>
Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Michael S. Tsirkin <mst@xxxxxxxxxx>
Cc: venkatesh.pallipadi@xxxxxxxxx
Cc: Stefan Bader <stefan.bader@xxxxxxxxxxxxx>
Cc: konrad.wilk@xxxxxxxxxx
Cc: ville.syrjala@xxxxxxxxxxxxxxx
Cc: david.vrabel@xxxxxxxxxx
Cc: jbeulich@xxxxxxxx
Cc: toshi.kani@xxxxxx
Cc: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Cc: linux-fbdev@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxx>
---
 drivers/infiniband/hw/qib/qib_wc_x86_64.c | 31 ++++---------------------------
 1 file changed, 4 insertions(+), 27 deletions(-)

diff --git a/drivers/infiniband/hw/qib/qib_wc_x86_64.c 
b/drivers/infiniband/hw/qib/qib_wc_x86_64.c
index fe0850a..6d61ef9 100644
--- a/drivers/infiniband/hw/qib/qib_wc_x86_64.c
+++ b/drivers/infiniband/hw/qib/qib_wc_x86_64.c
@@ -116,21 +116,9 @@ int qib_enable_wc(struct qib_devdata *dd)
        }
 
        if (!ret) {
-               int cookie;
-
-               cookie = mtrr_add(pioaddr, piolen, MTRR_TYPE_WRCOMB, 1);
-               if (cookie < 0) {
-                       {
-                               qib_devinfo(dd->pcidev,
-                                        "mtrr_add()  WC for PIO bufs failed 
(%d)\n",
-                                        cookie);
-                               ret = -EINVAL;
-                       }
-               } else {
-                       dd->wc_cookie = cookie;
-                       dd->wc_base = (unsigned long) pioaddr;
-                       dd->wc_len = (unsigned long) piolen;
-               }
+               dd->wc_cookie = arch_phys_wc_add(pioaddr, piolen);
+               if (dd->wc_cookie < 0)
+                       ret = -EINVAL;
        }
 
        return ret;
@@ -142,18 +130,7 @@ int qib_enable_wc(struct qib_devdata *dd)
  */
 void qib_disable_wc(struct qib_devdata *dd)
 {
-       if (dd->wc_cookie) {
-               int r;
-
-               r = mtrr_del(dd->wc_cookie, dd->wc_base,
-                            dd->wc_len);
-               if (r < 0)
-                       qib_devinfo(dd->pcidev,
-                                "mtrr_del(%lx, %lx, %lx) failed: %d\n",
-                                dd->wc_cookie, dd->wc_base,
-                                dd->wc_len, r);
-               dd->wc_cookie = 0; /* even on failure */
-       }
+       arch_phys_wc_del(dd->wc_cookie);
 }
 
 /**
-- 
2.3.2.209.gd67f9d5.dirty


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