From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
To: linux-i2c@vger.kernel.org
Cc: Wolfram Sang <wsa@the-dreams.de>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Jarkko Nikula <jarkko.nikula@linux.intel.com>,
stable@vger.kernel.org
Subject: [PATCH] i2c: designware-pci: Fix BUG_ON during device removal
Date: Thu, 13 Feb 2020 17:15:03 +0200 [thread overview]
Message-ID: <20200213151503.545269-1-jarkko.nikula@linux.intel.com> (raw)
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: 21aa3983d619 ("i2c: designware-pci: Switch over to MSI interrupts")
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
---
drivers/i2c/busses/i2c-designware-pcidrv.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 050adda7c1bd..05b35ac33ce3 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -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);
}
--
2.25.0
next reply other threads:[~2020-02-13 15:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-13 15:15 Jarkko Nikula [this message]
2020-02-13 16:18 ` [PATCH] i2c: designware-pci: Fix BUG_ON during device removal Wolfram Sang
2020-02-13 17:11 ` Andy Shevchenko
2020-02-14 9:26 ` Jarkko Nikula
2020-02-13 17:10 ` Andy Shevchenko
2020-03-10 9:34 ` Wolfram Sang
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