PCI: only wait 20ms for PHB logic to settle if we detected any PHBs

Otherwise, in simulators such as Mambo, we needlessly wait 20ms, which
takes much longer than 20ms to do, because simulator.

Fixes: 41b14f9452c25f3dd74a8304763a3cc58bff019f
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/core/pci.c b/core/pci.c
index 2d3c4f8..ec24167 100644
--- a/core/pci.c
+++ b/core/pci.c
@@ -1644,7 +1644,12 @@ void pci_init_slots(void)
 	/* Some PHBs may need that long to debounce the presence detect
 	 * after HW initialization.
 	 */
-	time_wait_ms(20);
+	for (i = 0; i < ARRAY_SIZE(phbs); i++) {
+		if (phbs[i]) {
+			time_wait_ms(20);
+			break;
+		}
+	}
 
 	prlog(PR_NOTICE, "PCI: Resetting PHBs...\n");
 	pci_do_jobs(pci_reset_phb);