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* [patch 1/1] drivers/net/ethernet/marvell/mvmdio.c: Fix non OF case
@ 2020-10-15  9:32 Arnaud Patard
  2020-10-15 10:04 ` Greg KH
  0 siblings, 1 reply; 9+ messages in thread
From: Arnaud Patard @ 2020-10-15  9:32 UTC (permalink / raw)
  To: stable; +Cc: netdev, Andrew Lunn, David S. Miller

commit d934423ac26ed373dfe089734d505dca5ff679b6 upstream.

Orion5.x systems are still using machine files and not device-tree.
Commit 96cb4342382290c9 ("net: mvmdio: allow up to three clocks to be
specified for orion-mdio") has replaced devm_clk_get() with of_clk_get(),
leading to a oops at boot and not working network, as reported in
https://lists.debian.org/debian-arm/2019/07/msg00088.html and possibly in
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908712.
    
Link: https://lists.debian.org/debian-arm/2019/07/msg00088.html
Fixes: 96cb4342382290c9 ("net: mvmdio: allow up to three clocks to be specified for orion-mdio")
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Index: linux/drivers/net/ethernet/marvell/mvmdio.c
===================================================================
--- linux.orig/drivers/net/ethernet/marvell/mvmdio.c
+++ linux/drivers/net/ethernet/marvell/mvmdio.c
@@ -319,15 +319,25 @@ static int orion_mdio_probe(struct platf
 
 	init_waitqueue_head(&dev->smi_busy_wait);
 
-	for (i = 0; i < ARRAY_SIZE(dev->clk); i++) {
-		dev->clk[i] = of_clk_get(pdev->dev.of_node, i);
-		if (PTR_ERR(dev->clk[i]) == -EPROBE_DEFER) {
+	if (pdev->dev.of_node) {
+		for (i = 0; i < ARRAY_SIZE(dev->clk); i++) {
+			dev->clk[i] = of_clk_get(pdev->dev.of_node, i);
+			if (PTR_ERR(dev->clk[i]) == -EPROBE_DEFER) {
+				ret = -EPROBE_DEFER;
+				goto out_clk;
+			}
+			if (IS_ERR(dev->clk[i]))
+				break;
+			clk_prepare_enable(dev->clk[i]);
+		}
+	} else {
+		dev->clk[0] = clk_get(&pdev->dev, NULL);
+		if (PTR_ERR(dev->clk[0]) == -EPROBE_DEFER) {
 			ret = -EPROBE_DEFER;
 			goto out_clk;
 		}
-		if (IS_ERR(dev->clk[i]))
-			break;
-		clk_prepare_enable(dev->clk[i]);
+		if (!IS_ERR(dev->clk[0]))
+			clk_prepare_enable(dev->clk[0]);
 	}
 
 	dev->err_interrupt = platform_get_irq(pdev, 0);





^ permalink raw reply	[flat|nested] 9+ messages in thread
* [patch 1/1] drivers/net/ethernet/marvell/mvmdio.c: Fix non OF case
@ 2019-08-02  8:32 Arnaud Patard
  2019-08-02 14:43 ` Andrew Lunn
                   ` (2 more replies)
  0 siblings, 3 replies; 9+ messages in thread
From: Arnaud Patard @ 2019-08-02  8:32 UTC (permalink / raw)
  To: netdev; +Cc: Andrew Lunn, Arnaud Patard

Orion5.x systems are still using machine files and not device-tree.
Commit 96cb4342382290c9 ("net: mvmdio: allow up to three clocks to be
specified for orion-mdio") has replaced devm_clk_get() with of_clk_get(),
leading to a oops at boot and not working network, as reported in 
https://lists.debian.org/debian-arm/2019/07/msg00088.html and possibly in
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908712.

Link: https://lists.debian.org/debian-arm/2019/07/msg00088.html
Fixes: 96cb4342382290c9 ("net: mvmdio: allow up to three clocks to be specified for orion-mdio")
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Index: linux-next/drivers/net/ethernet/marvell/mvmdio.c
===================================================================
--- linux-next.orig/drivers/net/ethernet/marvell/mvmdio.c
+++ linux-next/drivers/net/ethernet/marvell/mvmdio.c
@@ -319,20 +319,33 @@ static int orion_mdio_probe(struct platf
 
 	init_waitqueue_head(&dev->smi_busy_wait);
 
-	for (i = 0; i < ARRAY_SIZE(dev->clk); i++) {
-		dev->clk[i] = of_clk_get(pdev->dev.of_node, i);
-		if (PTR_ERR(dev->clk[i]) == -EPROBE_DEFER) {
+	if (pdev->dev.of_node) {
+		for (i = 0; i < ARRAY_SIZE(dev->clk); i++) {
+			dev->clk[i] = of_clk_get(pdev->dev.of_node, i);
+			if (PTR_ERR(dev->clk[i]) == -EPROBE_DEFER) {
+				ret = -EPROBE_DEFER;
+				goto out_clk;
+			}
+			if (IS_ERR(dev->clk[i]))
+				break;
+			clk_prepare_enable(dev->clk[i]);
+		}
+
+		if (!IS_ERR(of_clk_get(pdev->dev.of_node,
+				       ARRAY_SIZE(dev->clk))))
+			dev_warn(&pdev->dev,
+				 "unsupported number of clocks, limiting to the first "
+				 __stringify(ARRAY_SIZE(dev->clk)) "\n");
+	} else {
+		dev->clk[0] = clk_get(&pdev->dev, NULL);
+		if (PTR_ERR(dev->clk[0]) == -EPROBE_DEFER) {
 			ret = -EPROBE_DEFER;
 			goto out_clk;
 		}
-		if (IS_ERR(dev->clk[i]))
-			break;
-		clk_prepare_enable(dev->clk[i]);
+		if (!IS_ERR(dev->clk[0]))
+			clk_prepare_enable(dev->clk[0]);
 	}
 
-	if (!IS_ERR(of_clk_get(pdev->dev.of_node, ARRAY_SIZE(dev->clk))))
-		dev_warn(&pdev->dev, "unsupported number of clocks, limiting to the first "
-			 __stringify(ARRAY_SIZE(dev->clk)) "\n");
 
 	dev->err_interrupt = platform_get_irq(pdev, 0);
 	if (dev->err_interrupt > 0 &&



^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2020-10-16  8:00 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-10-15  9:32 [patch 1/1] drivers/net/ethernet/marvell/mvmdio.c: Fix non OF case Arnaud Patard
2020-10-15 10:04 ` Greg KH
2020-10-15 10:08   ` Arnaud Patard
2020-10-16  8:01     ` Greg KH
  -- strict thread matches above, loose matches on Subject: below --
2019-08-02  8:32 Arnaud Patard
2019-08-02 14:43 ` Andrew Lunn
2019-08-02 16:21   ` Arnaud Patard
2019-08-03 22:22 ` Andrew Lunn
2019-08-05 20:31 ` David Miller

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