---

yaml --- r: 17506 b: refs/heads/master c: c7ab337 h: refs/heads/master v: v3
git-mirror · Jan 9, 2006 · 57e8f79 · 57e8f79
1 parent 457517f
commit 57e8f79
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Showing 2 changed files with 18 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9d265124d051c2cf6716639239609d83f736dcdb
+refs/heads/master: c7ab337f91b59f71a30c3ab71e3bdfff41671977
diff --git a/trunk/drivers/pci/hotplug/pciehp_hpc.c b/trunk/drivers/pci/hotplug/pciehp_hpc.c
@@ -787,8 +787,13 @@ static int hpc_power_on_slot(struct slot * slot)
 
 	slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_ON;
 
+	/* Enable detection that we turned off at slot power-off time */
 	if (!pciehp_poll_mode)
-		slot_cmd = slot_cmd | HP_INTR_ENABLE; 
+		slot_cmd = slot_cmd |
+		           PWR_FAULT_DETECT_ENABLE |
+		           MRL_DETECT_ENABLE |
+		           PRSN_DETECT_ENABLE |
+		           HP_INTR_ENABLE;
 
 	retval = pcie_write_cmd(slot, slot_cmd);
 
@@ -833,8 +838,18 @@ static int hpc_power_off_slot(struct slot * slot)
 
 	slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_OFF;
 
+	/*
+	 * If we get MRL or presence detect interrupts now, the isr
+	 * will notice the sticky power-fault bit too and issue power
+	 * indicator change commands. This will lead to an endless loop
+	 * of command completions, since the power-fault bit remains on
+	 * till the slot is powered on again.
+	 */
 	if (!pciehp_poll_mode)
-		slot_cmd = slot_cmd | HP_INTR_ENABLE; 
+		slot_cmd = (slot_cmd &
+		            ~PWR_FAULT_DETECT_ENABLE &
+		            ~MRL_DETECT_ENABLE &
+		            ~PRSN_DETECT_ENABLE) | HP_INTR_ENABLE;
 
 	retval = pcie_write_cmd(slot, slot_cmd);