From: Brice Goglin <brice@myri.com>
Date: Mon, 18 Dec 2006 10:50:00 +0000 (+0100)
Subject: myri10ge: match number of save_state and restore
X-Git-Tag: v2.6.20-rc3~56^2~22
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7adda30c82f403c948b016a40fc68a1ef427dbca;p=linux-2.6

myri10ge: match number of save_state and restore

Since pci_save_state() pushes MSI and PCIe states on a kind of stack,
myri10ge saving the state in advance for parity recovery will push the
state again on the stack on suspend. This leads to some memory leak.
We add a couple additional calls to save_state and restore_state so
that we don't leak anymore.

For the future, we are thinking of a better way to recover from parity
error without using pci_save_state().

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 94ac168be5..2854026524 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -2641,6 +2641,10 @@ static void myri10ge_watchdog(struct work_struct *work)
 		 * nic was resumed from power saving mode.
 		 */
 		myri10ge_restore_state(mgp);
+
+		/* save state again for accounting reasons */
+		myri10ge_save_state(mgp);
+
 	} else {
 		/* if we get back -1's from our slot, perhaps somebody
 		 * powered off our card.  Don't try to reset it in
@@ -2907,7 +2911,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	status = register_netdev(netdev);
 	if (status != 0) {
 		dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
-		goto abort_with_irq;
+		goto abort_with_state;
 	}
 	dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
 		 (mgp->msi_enabled ? "MSI" : "xPIC"),
@@ -2916,7 +2920,8 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	return 0;
 
-abort_with_irq:
+abort_with_state:
+	myri10ge_restore_state(mgp);
 	free_irq(pdev->irq, mgp);
 	if (mgp->msi_enabled)
 		pci_disable_msi(pdev);
@@ -2976,6 +2981,9 @@ static void myri10ge_remove(struct pci_dev *pdev)
 
 	myri10ge_dummy_rdma(mgp, 0);
 
+	/* avoid a memory leak */
+	myri10ge_restore_state(mgp);
+
 	bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
 	dma_free_coherent(&pdev->dev, bytes,
 			  mgp->rx_done.entry, mgp->rx_done.bus);