Patch "ata: libahci: properly propagate return value of platform_get_irq()" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

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

    ata: libahci: properly propagate return value of platform_get_irq()

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:
     ata-libahci-properly-propagate-return-value-of-platform_get_irq.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 foo@baz Mon Apr  9 17:09:24 CEST 2018
From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Date: Tue, 16 May 2017 14:06:12 +0200
Subject: ata: libahci: properly propagate return value of platform_get_irq()

From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>


[ Upstream commit c034640a32f8456018d9c8c83799ead683046b95 ]

When platform_get_irq() fails, it returns an error code, which
libahci_platform and replaces it by -EINVAL. This commit fixes that by
propagating the error code. It fixes the situation where
platform_get_irq() returns -EPROBE_DEFER because the interrupt
controller is not available yet, and generally looks like the right
thing to do.

We pay attention to not show the "no irq" message when we are in an
EPROBE_DEFER situation, because the driver probing will be retried
later on, once the interrupt controller becomes available to provide
the interrupt.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/ata/libahci_platform.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -514,8 +514,9 @@ int ahci_platform_init_host(struct platf
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq <= 0) {
-		dev_err(dev, "no irq\n");
-		return -EINVAL;
+		if (irq != -EPROBE_DEFER)
+			dev_err(dev, "no irq\n");
+		return irq;
 	}
 
 	hpriv->irq = irq;


Patches currently in stable-queue which might be from thomas.petazzoni@free-electrons.com are

queue-4.9/ata-libahci-properly-propagate-return-value-of-platform_get_irq.patch