myri10ge: do not use mgp->max_intr_slots before loading the firmware

part of commit 0dcffac1 upstream
(the upstream multislice patch contains this fix within a large
 rework of the code since there is one rx_done ring per slice. The
 old allocating is replaced by a call to myri10ge_probe_slices())


Allocating the rx_done ring requires mgp->max_intr_slots to
be valid, which requires that we already loaded the firmware
we are going to use with this ring.
So move the allocating after myri10ge_load_firmware()
(but keep it before myri10ge_reset() which already needs the
 rx_done ring).

If fixedsa regression where loading the driver would not
appear to do anything. Regression introduced in 2.6.26-rc3 by
commit 014377a1

Reported and patch tested by Lukas Hejtmanek at
http://lkml.org/lkml/2008/7/22/305
Reproduced and patch tested also by me.
Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/net/myri10ge/myri10ge.c

@@ -3215,26 +3215,26 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	for (i = 0; i < ETH_ALEN; i++)
 		netdev->dev_addr[i] = mgp->mac_addr[i];
 
-	/* allocate rx done ring */
-	bytes = mgp->max_intr_slots * sizeof(*mgp->ss.rx_done.entry);
-	mgp->ss.rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
-						&mgp->ss.rx_done.bus, GFP_KERNEL);
-	if (mgp->ss.rx_done.entry == NULL)
-		goto abort_with_ioremap;
-	memset(mgp->ss.rx_done.entry, 0, bytes);
-
 	myri10ge_select_firmware(mgp);
 
 	status = myri10ge_load_firmware(mgp);
 	if (status != 0) {
 		dev_err(&pdev->dev, "failed to load firmware\n");
-		goto abort_with_rx_done;
+		goto abort_with_ioremap;
 	}
 
+	/* allocate rx done ring */
+	bytes = mgp->max_intr_slots * sizeof(*mgp->ss.rx_done.entry);
+	mgp->ss.rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
+						&mgp->ss.rx_done.bus, GFP_KERNEL);
+	if (mgp->ss.rx_done.entry == NULL)
+		goto abort_with_firmware;
+	memset(mgp->ss.rx_done.entry, 0, bytes);
+
 	status = myri10ge_reset(mgp);
 	if (status != 0) {
 		dev_err(&pdev->dev, "failed reset\n");
-		goto abort_with_firmware;
+		goto abort_with_rx_done;
 	}
 
 	pci_set_drvdata(pdev, mgp);
@@ -3260,7 +3260,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	 * is set to correct value if MSI is enabled */
 	status = myri10ge_request_irq(mgp);
 	if (status != 0)
-		goto abort_with_firmware;
+		goto abort_with_rx_done;
 	netdev->irq = pdev->irq;
 	myri10ge_free_irq(mgp);
 
@@ -3289,14 +3289,14 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 abort_with_state:
 	pci_restore_state(pdev);
 
-abort_with_firmware:
-	myri10ge_dummy_rdma(mgp, 0);
-
 abort_with_rx_done:
 	bytes = mgp->max_intr_slots * sizeof(*mgp->ss.rx_done.entry);
 	dma_free_coherent(&pdev->dev, bytes,
 			  mgp->ss.rx_done.entry, mgp->ss.rx_done.bus);
 
+abort_with_firmware:
+	myri10ge_dummy_rdma(mgp, 0);
+
 abort_with_ioremap:
 	iounmap(mgp->sram);