powerpc/powernv: Use CPU-endian hub diag-data type in pnv_eeh_get_and_dump_hub_diag()

BugLink: http://bugs.launchpad.net/bugs/1637510
commit a7032132d7560a8434e1f54b71efd7fa20f073bd upstream.

The hub diag-data type is filled with big-endian data by OPAL call
opal_pci_get_hub_diag_data(). We need convert it to CPU-endian value
before using it. The issue is reported by sparse as pointed by Michael
Ellerman:

  eeh-powernv.c:1309:21: warning: restricted __be16 degrades to integer

This converts hub diag-data type to CPU-endian before using it in
pnv_eeh_get_and_dump_hub_diag().

Fixes: 2a485ad7c88d ("powerpc/powernv: Drop PHB operation next_error()")
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
index 118af9650744da27c41836f54d73ff1e11103d42..ba0cae69a39685666b29870c1eb0a2eb27816aae 100644 (file)
--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
@@ -1163,7 +1163,7 @@ static void pnv_eeh_get_and_dump_hub_diag(struct pci_controller *hose)
                return;
        }
 
-       switch (data->type) {
+       switch (be16_to_cpu(data->type)) {
        case OPAL_P7IOC_DIAG_TYPE_RGC:
                pr_info("P7IOC diag-data for RGC\n\n");
                pnv_eeh_dump_hub_diag_common(data);