[Skiboot] [PATCH] PHB3: Disable UTL outbound discard error interrupt

Gavin Shan gwshan at linux.vnet.ibm.com
Wed Jul 6 10:09:45 AEST 2016

On Tue, Jul 05, 2016 at 06:36:26PM +1000, Stewart Smith wrote:
>Gavin Shan <gwshan at linux.vnet.ibm.com> writes:
>> The UTL outbound discard error (bit#12) in UTL_PCIE_PORT_IRQ_EN
>> (offset: 0x558) isn't set in initial setup. It's set wrongly after
>> a reset on root port. With this bit set, frozen (all) error was
>> observed on the PHB to which a LPFC adapter is connected directly.
>> This removes the bit in reset handler to avoid the unexpected
>> frozen (all) error.
>>  BZ: 142877
>> Reported-by: Pridhiviraj Paidipeddi <ppaidipe at in.ibm.com>
>> Signed-off-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
>> ---
>> Good candidate for stable releases
>> ---
>>  hw/phb3.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>Merged to master as of ae0339e, but it doesn't apply cleanly to stable,
>able to send a patch for 5.2.x?

We needn't backport it to 5.2.x actually. The PCI hotplug patchset were
there before commit 2bb9c4bb2 ("PHB3: Fix unexpected ER (all) on errinjct
by PCI config") got merged. So the hotplug commit e1922cb ("hw/phb3: Support
PHB slot") kills the change introduced by 2bb9c4bb2 in master branch only.

Commit 2bb9c4bb2 were in 5.2.x and everything looks good there.


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