path: root/drivers/i2c
diff options
authorHans de Goede <hdegoede@redhat.com>2017-11-22 12:28:17 +0100
committerWolfram Sang <wsa@the-dreams.de>2017-11-27 19:11:27 +0100
commit6e0c9507bf51e1517a80ad0ac171e5402528fcef (patch)
tree0adec0b63d87192ea27dd696d61e9a4b5d9559e0 /drivers/i2c
parent4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 (diff)
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: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
1 files changed, 3 insertions, 0 deletions
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;

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