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IB/qib: Don't mark VL15 bufs as WC to avoid a rare 7322 chip problem

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Don't set write combining via PAT on the VL15 buffers to avoid a rare
problem with unaligned writes from interrupt-flushed store buffers.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Dave Olson
2010-06-17 23:13:44 +00:00
committed by Roland Dreier
parent 67a3e12b05
commit fce24a9d28
6 changed files with 46 additions and 6 deletions
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6
drivers/infiniband/hw/qib/qib_tx.c
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@ -340,9 +340,13 @@ rescan:
if (i < dd->piobcnt2k)
buf = (u32 __iomem *)(dd->pio2kbase +
i * dd->palign);
else
else if (i < dd->piobcnt2k + dd->piobcnt4k || !dd->piovl15base)
buf = (u32 __iomem *)(dd->pio4kbase +
(i - dd->piobcnt2k) * dd->align4k);
else
buf = (u32 __iomem *)(dd->piovl15base +
(i - (dd->piobcnt2k + dd->piobcnt4k)) *
dd->align4k);
if (pbufnum)
*pbufnum = i;
dd->upd_pio_shadow = 0;