b43: Disable PMQ mechanism (09ebe2f9) · Commits · 戴 / test

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

+14 −0

Original line number	Diff line number	Diff line
		@@ -2675,6 +2675,20 @@ static void b43_adjust_opmode(struct b43_wldev *dev)
		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)

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