4.14-stable review patch. If anyone has any objections, please let me know.
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From: Hans de Goede hdegoede@redhat.com
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@redhat.com Reviewed-by: Jean Delvare jdelvare@suse.de Signed-off-by: Wolfram Sang wsa@the-dreams.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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 @@ -1617,6 +1617,9 @@ 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;