Patch "pinctrl: mcp23s08: fix irq setup order" has been added to the 4.15-stable tree

Patch "pinctrl: mcp23s08: fix irq setup order" has been added to the 4.15-stable tree

[gregkh]

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

    pinctrl: mcp23s08: fix irq setup order

to the 4.15-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:
     pinctrl-mcp23s08-fix-irq-setup-order.patch
and it can be found in the queue-4.15 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 02e389e63e3523828fc3832f27e0341885f60f6f Mon Sep 17 00:00:00 2001
From: Dmitry Mastykin <mastichi@gmail.com>
Date: Thu, 28 Dec 2017 18:19:24 +0300
Subject: pinctrl: mcp23s08: fix irq setup order

From: Dmitry Mastykin <mastichi@gmail.com>

commit 02e389e63e3523828fc3832f27e0341885f60f6f upstream.

When using mcp23s08 module with gpio-keys, often (50% of boots)
it fails to get irq numbers with message:
"gpio-keys keys: Unable to get irq number for GPIO 0, error -6".
Seems that irqs must be setup before devm_gpiochip_add_data().

Signed-off-by: Dmitry Mastykin <mastichi@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pinctrl/pinctrl-mcp23s08.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/pinctrl/pinctrl-mcp23s08.c
+++ b/drivers/pinctrl/pinctrl-mcp23s08.c
@@ -896,16 +896,16 @@ static int mcp23s08_probe_one(struct mcp
 			goto fail;
 	}
 
-	ret = devm_gpiochip_add_data(dev, &mcp->chip, mcp);
-	if (ret < 0)
-		goto fail;
-
 	if (mcp->irq && mcp->irq_controller) {
 		ret = mcp23s08_irq_setup(mcp);
 		if (ret)
 			goto fail;
 	}
 
+	ret = devm_gpiochip_add_data(dev, &mcp->chip, mcp);
+	if (ret < 0)
+		goto fail;
+
 	mcp->pinctrl_desc.name = "mcp23xxx-pinctrl";
 	mcp->pinctrl_desc.pctlops = &mcp_pinctrl_ops;
 	mcp->pinctrl_desc.confops = &mcp_pinconf_ops;


Patches currently in stable-queue which might be from mastichi@gmail.com are

queue-4.15/pinctrl-mcp23s08-fix-irq-setup-order.patch