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i2c: designware-pci: Fix BUG_ON during device removal

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commit 9be8bc4dd6177cf992b93b0bd014c4f611283896 upstream.

Function i2c_dw_pci_remove() -> pci_free_irq_vectors() ->
pci_disable_msi() -> free_msi_irqs() will throw a BUG_ON() for MSI
enabled device since the driver has not released the requested IRQ before
calling the pci_free_irq_vectors().

Here driver requests an IRQ using devm_request_irq() but automatic
release happens only after remove callback. Fix this by explicitly
freeing the IRQ before calling pci_free_irq_vectors().

Fixes: 21aa3983d6 ("i2c: designware-pci: Switch over to MSI interrupts")
Cc: [email protected] # v5.4+
Signed-off-by: Jarkko Nikula <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Jarkko Nikula 2020-02-13 17:15:03 +02:00 • committed by Greg Kroah-Hartman
commit 1357bf0ca5
1 changed files with 1 additions and 0 deletions
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1
drivers/i2c/busses/i2c-designware-pcidrv.c
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@ -313,6 +313,7 @@ static void i2c_dw_pci_remove(struct pci_dev *pdev)
pm_runtime_get_noresume(&pdev->dev);
i2c_del_adapter(&dev->adapter);
devm_free_irq(&pdev->dev, dev->irq, dev);
pci_free_irq_vectors(pdev);
}