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-rw-r--r--drivers/infiniband/hw/ipath/ipath_file_ops.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c
index 1af1f3a907c6..ceab52c09cdb 100644
--- a/drivers/infiniband/hw/ipath/ipath_file_ops.c
+++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c
@@ -223,8 +223,13 @@ static int ipath_get_base_info(struct file *fp,
(unsigned long long) kinfo->spi_subport_rcvhdr_base);
}
- kinfo->spi_pioindex = (kinfo->spi_piobufbase - dd->ipath_piobufbase) /
- dd->ipath_palign;
+ /*
+ * All user buffers are 2KB buffers. If we ever support
+ * giving 4KB buffers to user processes, this will need some
+ * work.
+ */
+ kinfo->spi_pioindex = (kinfo->spi_piobufbase -
+ (dd->ipath_piobufbase & 0xffffffff)) / dd->ipath_palign;
kinfo->spi_pioalign = dd->ipath_palign;
kinfo->spi_qpair = IPATH_KD_QP;