IB/ipath: Add flag and handling for chips with swapped register bug
The 6110 had a bug that caused some registers to be swapped; it was
fixed for the 7220 (and didn't affect the 6120 because it had fewer
registers). This adds a flag and related code to handle that, and
includes some minor cleanups in the same area.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c
index 3174c31..4471674 100644
--- a/drivers/infiniband/hw/ipath/ipath_init_chip.c
+++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c
@@ -528,12 +528,8 @@
/*
* Chip Errata bug 6641; even and odd qwords>3 are swapped.
*/
- if (i > 3) {
- if (i & 1)
- val = dd->ipath_pioavailregs_dma[i - 1];
- else
- val = dd->ipath_pioavailregs_dma[i + 1];
- }
+ if (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS))
+ val = dd->ipath_pioavailregs_dma[i ^ 1];
else
val = dd->ipath_pioavailregs_dma[i];
dd->ipath_pioavailshadow[i] = le64_to_cpu(val);