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Commit 6e0c9507 authored by Hans de Goede's avatar Hans de Goede Committed by Wolfram Sang
Browse files

i2c: i801: Fix Failed to allocate irq -2147483648 error 

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

Cc: stable@vger.kernel.org
BugLink: https://communities.intel.com/thread/114759


Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Reviewed-by: default avatarJean Delvare <jdelvare@suse.de>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent 4fbd8d19

drivers/i2c/busses/i2c-i801.c

+3 −0
Original line number Diff line number Diff line
@@ -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;