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

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commit 6e0c9507bf 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>

...

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Hans de Goede 2017-11-22 12:28:17 +01:00 • committed by Greg Kroah-Hartman

parent 52d9bb958f

commit 9c71f896bb

1 changed files with 3 additions and 0 deletions

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drivers/i2c/busses/i2c-i801.c

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