Patch "powerpc/powernv: Pass CPU-endian PE number to opal_pci_eeh_freeze_clear()" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

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

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
powerpc-powernv-pass-cpu-endian-pe-number-to-opal_pci_eeh_freeze_clear.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Gavin Shan <[email protected]>
Date: Tue, 2 Aug 2016 14:10:29 +1000
Subject: powerpc/powernv: Pass CPU-endian PE number to opal_pci_eeh_freeze_clear()

From: Gavin Shan <[email protected]>

commit d63e51b31e0b655ed0f581b8a8fd4c4b4f8d1919 upstream.

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.

---
 arch/powerpc/platforms/powernv/eeh-powernv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -1395,7 +1395,7 @@ static int pnv_eeh_next_error(struct eeh
 
 				/* 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 ||

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/powerpc-powernv-pass-cpu-endian-pe-number-to-opal_pci_eeh_freeze_clear.patch queue-4.4/powerpc-powernv-use-cpu-endian-hub-diag-data-type-in-pnv_eeh_get_and_dump_hub_diag.patch queue-4.4/powerpc-powernv-use-cpu-endian-pest-in-pnv_pci_dump_p7ioc_diag_data.patch