Hi Hans, On Wed, 22 Nov 2017 12:28:17 +0100, Hans de Goede wrote: > 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 Isn't it a BIOS bug? > Cc: stable@xxxxxxxxxxxxxxx > BugLink: https://communities.intel.com/thread/114759 > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > --- > drivers/i2c/busses/i2c-i801.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c > index 9e12a53ef7b8..8eac00efadc1 100644 > --- 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 *dev, const struct pci_device_id *id) > /* 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; Certainly better than returning a cryptic error message, so: Reviewed-by: Jean Delvare <jdelvare@xxxxxxx> However if this is considered a BIOS bug then a pr_err(FW_BUG...) would be good to add IMHO. -- Jean Delvare SUSE L3 Support