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[PATCH 2/3] pcie_chassis: add slot_max field
From: |
Tom Yan |
Subject: |
[PATCH 2/3] pcie_chassis: add slot_max field |
Date: |
Thu, 1 Apr 2021 00:08:34 +0800 |
Keep track of the largested allocated slot number when adding slot.
Signed-off-by: Tom Yan <tom.ty89@gmail.com>
---
hw/pci/pcie_port.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/hw/pci/pcie_port.c b/hw/pci/pcie_port.c
index 40fd80c4da..1e2348250c 100644
--- a/hw/pci/pcie_port.c
+++ b/hw/pci/pcie_port.c
@@ -49,6 +49,7 @@ void pcie_port_init_reg(PCIDevice *d)
*/
struct PCIEChassis {
uint8_t number;
+ uint16_t slot_max; // largest allocated slot number
QLIST_HEAD(, PCIESlot) slots;
QLIST_ENTRY(PCIEChassis) next;
@@ -94,19 +95,11 @@ static PCIESlot *pcie_chassis_find_slot_with_chassis(struct
PCIEChassis *c,
static void pcie_chassis_find_avail_slot_with_chassis(struct PCIEChassis *c,
struct PCIESlot *slot)
{
- PCIESlot *s;
- uint16_t slot_max = 0;
- QLIST_FOREACH(s, &c->slots, next) {
- if (s->slot > slot_max) {
- slot_max = s->slot;
- }
- }
-
/*
find an available number to use from slot->slot (inclusive) to
- slot_max; if there is none, use slot_max+1
+ c->slot_max; if there is none, use c->slot_max+1
*/
- while (slot->slot <= slot_max) {
+ while (slot->slot <= c->slot_max) {
if (!pcie_chassis_find_slot_with_chassis(c, slot->slot)) {
break;
}
@@ -137,6 +130,8 @@ int pcie_chassis_add_slot(struct PCIESlot *slot)
return -EBUSY;
}
QLIST_INSERT_HEAD(&c->slots, slot, next);
+ if (slot->slot > c->slot_max)
+ c->slot_max = slot->slot;
return 0;
}
--
2.31.1