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wcte12xp, wctdm24xxp: Remove a PCI read from hardirq context.

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No need for the CPU to wait there for that write to flush when all the
writes will be flushed when the interrupt is acknoledged later. Saves
nearly a 1 us from the interrupt handler on a 3Ghz Xeon test system.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Michael Spiceland <mspiceland@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9887 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This commit is contained in:
Shaun Ruffell 2011-04-04 16:25:42 +00:00
parent 5ffb28b1f0
commit 7487ce229d
1 changed files with 2 additions and 1 deletions
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3
drivers/dahdi/voicebus/voicebus.c
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@ -1564,7 +1564,8 @@ static void vb_tasklet_normal(unsigned long data)
list_del(&vbb->entry);
__voicebus_transmit(vb, vbb);
}
__vb_setctl(vb, 0x0008, 0x00000000);
writel(0, vb->iobase + 0x8);
/* Print any messages about soft latency bumps after we fix the transmit
* descriptor ring. Otherwise it's possible to take so much time