Patch "ACPI / gpio: do not fall back to parsing _CRS when we get a deferral" has been added to the 4.9-stable tree

Patch "ACPI / gpio: do not fall back to parsing _CRS when we get a deferral" has been added to the 4.9-stable tree

[gregkh]

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

    ACPI / gpio: do not fall back to parsing _CRS when we get a deferral

to the 4.9-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:
     acpi-gpio-do-not-fall-back-to-parsing-_crs-when-we-get-a-deferral.patch
and it can be found in the queue-4.9 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 693bdaa164b40b7aa6018b98af6f7e40dbd52457 Mon Sep 17 00:00:00 2001
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Thu, 23 Mar 2017 13:21:38 -0700
Subject: ACPI / gpio: do not fall back to parsing _CRS when we get a deferral

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

commit 693bdaa164b40b7aa6018b98af6f7e40dbd52457 upstream.

If, while locating GPIOs by name, we get probe deferral, we should
immediately report it to caller rather than trying to fall back to parsing
unnamed GPIOs from _CRS block.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-and-Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpio/gpiolib-acpi.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -571,8 +571,10 @@ struct gpio_desc *acpi_find_gpio(struct
 		}
 
 		desc = acpi_get_gpiod_by_index(adev, propname, idx, &info);
-		if (!IS_ERR(desc) || (PTR_ERR(desc) == -EPROBE_DEFER))
+		if (!IS_ERR(desc))
 			break;
+		if (PTR_ERR(desc) == -EPROBE_DEFER)
+			return ERR_CAST(desc);
 	}
 
 	/* Then from plain _CRS GPIOs */


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

queue-4.9/acpi-gpio-do-not-fall-back-to-parsing-_crs-when-we-get-a-deferral.patch