Patch "memory: omap-gpmc: allow probe of child nodes to fail" has been added to the 4.7-stable tree

Patch "memory: omap-gpmc: allow probe of child nodes to fail" has been added to the 4.7-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    memory: omap-gpmc: allow probe of child nodes to fail

to the 4.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     memory-omap-gpmc-allow-probe-of-child-nodes-to-fail.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 23540d6e2f3193b946c4de43e3f9654fa6d23fe7 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Sun, 24 Jul 2016 14:10:58 +0200
Subject: memory: omap-gpmc: allow probe of child nodes to fail

From: Johan Hovold <johan@kernel.org>

commit 23540d6e2f3193b946c4de43e3f9654fa6d23fe7 upstream.

A recent commit (inadvertently?) changed how failed probe of a gpmc
child node was handled. Instead of proceeding with setting up any other
children as before, a single error now aborts the whole process.

This change broke networking on some Overo boards due to probe failing
for an unrelated nand node. This second issue should obviously be
fixed, but let's restore the old behaviour of allowing child-node
probe to fail to avoid further similar breakage on other systems.

Fixes: d2d00862dfbb ("memory: omap-gpmc: Support general purpose input
for WAITPINs")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/memory/omap-gpmc.c |   21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

--- a/drivers/memory/omap-gpmc.c
+++ b/drivers/memory/omap-gpmc.c
@@ -2250,7 +2250,7 @@ static int gpmc_probe_dt(struct platform
 	return 0;
 }
 
-static int gpmc_probe_dt_children(struct platform_device *pdev)
+static void gpmc_probe_dt_children(struct platform_device *pdev)
 {
 	int ret;
 	struct device_node *child;
@@ -2265,11 +2265,11 @@ static int gpmc_probe_dt_children(struct
 		else
 			ret = gpmc_probe_generic_child(pdev, child);
 
-		if (ret)
-			return ret;
+		if (ret) {
+			dev_err(&pdev->dev, "failed to probe DT child '%s': %d\n",
+				child->name, ret);
+		}
 	}
-
-	return 0;
 }
 #else
 static int gpmc_probe_dt(struct platform_device *pdev)
@@ -2277,9 +2277,8 @@ static int gpmc_probe_dt(struct platform
 	return 0;
 }
 
-static int gpmc_probe_dt_children(struct platform_device *pdev)
+static void gpmc_probe_dt_children(struct platform_device *pdev)
 {
-	return 0;
 }
 #endif
 
@@ -2372,16 +2371,10 @@ static int gpmc_probe(struct platform_de
 		goto setup_irq_failed;
 	}
 
-	rc = gpmc_probe_dt_children(pdev);
-	if (rc < 0) {
-		dev_err(gpmc->dev, "failed to probe DT children\n");
-		goto dt_children_failed;
-	}
+	gpmc_probe_dt_children(pdev);
 
 	return 0;
 
-dt_children_failed:
-	gpmc_free_irq(gpmc);
 setup_irq_failed:
 	gpmc_gpio_exit(gpmc);
 gpio_init_failed:


Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.7/memory-omap-gpmc-allow-probe-of-child-nodes-to-fail.patch
queue-4.7/usb-serial-simple-add-support-for-another-infineon-flashloader.patch
queue-4.7/arm-dts-overo-fix-gpmc-nand-on-boards-with-ethernet.patch
queue-4.7/arm-dts-overo-fix-gpmc-nand-cs0-range.patch