powerpc/powernv: Pass CPU-endian PE number to opal_pci_eeh_freeze_clear()

The PE number (@frozen_pe_no), filled by opal_pci_next_error() is in
big-endian format. It should be converted to CPU-endian before it is
passed to opal_pci_eeh_freeze_clear() when clearing the frozen state if
the PE is invalid one. As Michael Ellerman pointed out, the issue is
also detected by sparse:

  eeh-powernv.c:1541:41: warning: incorrect type in argument 2 (different base types)

This passes CPU-endian PE number to opal_pci_eeh_freeze_clear() and it
should be part of commit <0f36db77643b> ("powerpc/eeh: Fix wrong printed
PE number"), which was merged to 4.3 kernel.

Fixes: 71b540adffd9 ("powerpc/powernv: Don't escalate non-existing frozen PE")
Cc: stable@vger.kernel.org # v4.3+
Suggested-by: Paul Mackerras <paulus@samba.org>
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>

diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
index 995947d..1596a7e 100644 (file)
--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
@@ -1546,7 +1546,7 @@ static int pnv_eeh_next_error(struct eeh_pe **pe)
 
                                /* Try best to clear it */
                                opal_pci_eeh_freeze_clear(phb->opal_id,
-                                       frozen_pe_no,
+                                       be64_to_cpu(frozen_pe_no),
                                        OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
                                ret = EEH_NEXT_ERR_NONE;
                        } else if ((*pe)->state & EEH_PE_ISOLATED ||