powerpc/eeh: Refactor eeh_reset_pe_once()

We shouldn't check that the returned PE status is exactly equal to
(EEH_STATE_MMIO_ACTIVE | EEH_STATE_DMA_ACTIVE) but instead only check
that they are both set.

[benh: changelog]
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/eeh.c

@@ -565,6 +565,7 @@ static void eeh_reset_pe_once(struct eeh_pe *pe)
  */
 int eeh_reset_pe(struct eeh_pe *pe)
 {
+	int flags = (EEH_STATE_MMIO_ACTIVE | EEH_STATE_DMA_ACTIVE);
 	int i, rc;
 
 	/* Take three shots at resetting the bus */
@@ -572,7 +573,7 @@ int eeh_reset_pe(struct eeh_pe *pe)
 		eeh_reset_pe_once(pe);
 
 		rc = eeh_ops->wait_state(pe, PCI_BUS_RESET_WAIT_MSEC);
-		if (rc == (EEH_STATE_MMIO_ACTIVE | EEH_STATE_DMA_ACTIVE))
+		if ((rc & flags) == flags)
 			return 0;
 
 		if (rc < 0) {