]> nv-tegra.nvidia Code Review - linux-2.6.git/commitdiff
b43: Disable PMQ mechanism
authorMichael Buesch <mb@bu3sch.de>
Fri, 11 Sep 2009 22:52:48 +0000 (00:52 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Wed, 23 Sep 2009 15:35:44 +0000 (11:35 -0400)
This reduces IRQ pressure by about one third on a saturated link
by disabling the PMQ mechanism. We currently don't use that mechanism.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/b43/main.c

index 6468bbeba687ec820bdbed5dd4d94a40ef4b9b77..7fa947ca7c32df8151e202e24d7e47eecb437de2 100644 (file)
@@ -2675,6 +2675,20 @@ static void b43_adjust_opmode(struct b43_wldev *dev)
                        cfp_pretbtt = 50;
        }
        b43_write16(dev, 0x612, cfp_pretbtt);
                        cfp_pretbtt = 50;
        }
        b43_write16(dev, 0x612, cfp_pretbtt);
+
+       /* FIXME: We don't currently implement the PMQ mechanism,
+        *        so always disable it. If we want to implement PMQ,
+        *        we need to enable it here (clear DISCPMQ) in AP mode.
+        */
+       if (0  /* ctl & B43_MACCTL_AP */) {
+               b43_write32(dev, B43_MMIO_MACCTL,
+                           b43_read32(dev, B43_MMIO_MACCTL)
+                           & ~B43_MACCTL_DISCPMQ);
+       } else {
+               b43_write32(dev, B43_MMIO_MACCTL,
+                           b43_read32(dev, B43_MMIO_MACCTL)
+                           | B43_MACCTL_DISCPMQ);
+       }
 }
 
 static void b43_rate_memory_write(struct b43_wldev *dev, u16 rate, int is_ofdm)
 }
 
 static void b43_rate_memory_write(struct b43_wldev *dev, u16 rate, int is_ofdm)