Patch "pinctrl: sh-pfc: only use dummy states for non-DT platforms" has been added to the 4.4-stable tree

Patch "pinctrl: sh-pfc: only use dummy states for non-DT platforms" has been added to the 4.4-stable tree

[gregkh]

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

    pinctrl: sh-pfc: only use dummy states for non-DT platforms

to the 4.4-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-sh-pfc-only-use-dummy-states-for-non-dt-platforms.patch
and it can be found in the queue-4.4 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 0129801be4b87226bf502f18f5a9eabd356d1058 Mon Sep 17 00:00:00 2001
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Mon, 7 Mar 2016 19:40:57 +0100
Subject: pinctrl: sh-pfc: only use dummy states for non-DT platforms

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 0129801be4b87226bf502f18f5a9eabd356d1058 upstream.

If pinctrl_provide_dummies() is used unconditionally, then the dummy
state will be used even on DT platforms when the "init" state was
intentionally left out. Instead of "default", the dummy "init" state
will then be used during probe. Thus, when probing an I2C controller on
cold boot, communication triggered by bus notifiers broke because the
pins were not initialized.

Do it like OMAP2: use the dummy state only for non-DT platforms.

Fixes: ef0eebc05130 ("drivers/pinctrl: Add the concept of an "init" state")
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pinctrl/sh-pfc/core.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/pinctrl/sh-pfc/core.c
+++ b/drivers/pinctrl/sh-pfc/core.c
@@ -545,7 +545,9 @@ static int sh_pfc_probe(struct platform_
 			return ret;
 	}
 
-	pinctrl_provide_dummies();
+	/* Enable dummy states for those platforms without pinctrl support */
+	if (!of_have_populated_dt())
+		pinctrl_provide_dummies();
 
 	ret = sh_pfc_init_ranges(pfc);
 	if (ret < 0)


Patches currently in stable-queue which might be from wsa+renesas@sang-engineering.com are

queue-4.4/sh_eth-fix-null-pointer-dereference-in-sh_eth_ring_format.patch
queue-4.4/pinctrl-sh-pfc-only-use-dummy-states-for-non-dt-platforms.patch