This is a note to let you know that I've just added the patch titled
i2c: i801: Fix Failed to allocate irq -2147483648 error
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:
i2c-i801-fix-failed-to-allocate-irq-2147483648-error.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@xxxxxxxxxxxxxxx> know about it.
>From 6e0c9507bf51e1517a80ad0ac171e5402528fcef Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Wed, 22 Nov 2017 12:28:17 +0100
Subject: i2c: i801: Fix Failed to allocate irq -2147483648 error
From: Hans de Goede <hdegoede@xxxxxxxxxx>
commit 6e0c9507bf51e1517a80ad0ac171e5402528fcef upstream.
On Apollo Lake devices the BIOS does not set up IRQ routing for the i801
SMBUS controller IRQ, so we end up with dev->irq set to IRQ_NOTCONNECTED.
Detect this and do not try to use the irq in this case silencing:
i801_smbus 0000:00:1f.1: Failed to allocate irq -2147483648: -107
BugLink: https://communities.intel.com/thread/114759
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Reviewed-by: Jean Delvare <jdelvare@xxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-i801.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1592,6 +1592,9 @@ static int i801_probe(struct pci_dev *de
/* Default timeout in interrupt mode: 200 ms */
priv->adapter.timeout = HZ / 5;
+ if (dev->irq == IRQ_NOTCONNECTED)
+ priv->features &= ~FEATURE_IRQ;
+
if (priv->features & FEATURE_IRQ) {
u16 pcictl, pcists;
Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are
queue-4.9/i2c-i801-fix-failed-to-allocate-irq-2147483648-error.patch