linux-kernel - [PATCH 5/7] pciehp: Add pcie_wait_link_not

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Date:	Sat, 21 Jan 2012 01:52:17 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Matthew Wilcox <matthew@....cx>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>,
	Yinghai Lu <yinghai.lu@...cle.com>
Subject: [PATCH 5/7] pciehp: Add pcie_wait_link_not_active()

Will use for link disable status checking

Signed-off-by: Yinghai Lu <yinghai.lu@...cle.com>
---
 drivers/pci/hotplug/pciehp_hpc.c |   19 +++++++++++++++----
 1 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index a1a9879..ea54aef 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -257,19 +257,30 @@ static bool check_link_active(struct controller *ctrl)
 	return ret;
 }
 
-static void pcie_wait_link_active(struct controller *ctrl)
+static void __pcie_wait_link_active(struct controller *ctrl, bool active)
 {
 	int timeout = 1000;
 
-	if (check_link_active(ctrl))
+	if (check_link_active(ctrl) == active)
 		return;
 	while (timeout > 0) {
 		msleep(10);
 		timeout -= 10;
-		if (check_link_active(ctrl))
+		if (check_link_active(ctrl) == active)
 			return;
 	}
-	ctrl_dbg(ctrl, "Data Link Layer Link Active not set in 1000 msec\n");
+	ctrl_dbg(ctrl, "Data Link Layer Link Active not %s in 1000 msec\n",
+			active ? "set" : "cleared");
+}
+
+static void pcie_wait_link_active(struct controller *ctrl)
+{
+	__pcie_wait_link_active(ctrl, true);
+}
+
+static void pcie_wait_link_not_active(struct controller *ctrl)
+{
+	__pcie_wait_link_active(ctrl, false);
 }
 
 static bool pci_bus_check_dev(struct pci_bus *bus, int devfn)
-- 
1.7.7

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