powerpc/powernv: Call opal_pci_poll() if needed

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When issuing PHB reset, OPAL API opal_pci_poll() is called to drive
the state machine in OPAL forward. However, we needn't always call
the function under some circumstances like reset deassert.

This avoids calling opal_pci_poll() when OPAL_SUCCESS is returned
from opal_pci_reset(). Except the overhead introduced by additional
one unnecessary OPAL call, I didn't run into real issue because of
this.

Reported-by: Pridhiviraj Paidipeddi <ppaiddipe@in.ibm.com>
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Gavin Shan 2016-06-24 16:44:19 +10:00 • committed by Michael Ellerman

parent c762c69e10

commit fbce44d0ed

1 changed files with 4 additions and 2 deletions

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arch/powerpc/platforms/powernv/eeh-powernv.c

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