[dpdk-dev] [PATCH v1] igb_uio: fix unexpected removal for hot-unplug

Jeff Guo jia.guo at intel.com
Thu Oct 18 08:27:15 CEST 2018

When a device is hot-unplugged, pci_remove will be invoked unexpectedly
before pci_release, it will caused kernel hung issue which will throw the
error info of "Trying to free already-free IRQ XXX". And on the other hand,
if pci_remove before pci_release, the interrupt will not got chance to be
disabled. So this patch aim to fix this issue by adding pci_release call
in pci_remove, it will gurranty that all pci clean up will be done before
pci removal.

Signed-off-by: Jeff Guo <jia.guo at intel.com>
 kernel/linux/igb_uio/igb_uio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/linux/igb_uio/igb_uio.c b/kernel/linux/igb_uio/igb_uio.c
index fede66c..3cf394b 100644
--- a/kernel/linux/igb_uio/igb_uio.c
+++ b/kernel/linux/igb_uio/igb_uio.c
@@ -570,6 +570,8 @@ igbuio_pci_remove(struct pci_dev *dev)
 	struct rte_uio_pci_dev *udev = pci_get_drvdata(dev);
+	igbuio_pci_release(&udev->info, NULL);
 	sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp);

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