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

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 <[email protected]> know about it.

From: Thomas Petazzoni <[email protected]>
Date: Tue, 16 May 2017 14:06:12 +0200
Subject: ata: libahci: properly propagate return value of platform_get_irq()

From: Thomas Petazzoni <[email protected]>

[ 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.

---
 drivers/ata/libahci_platform.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

@@ -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 [email protected] are

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