From: Jeff Guo <jia.guo@intel.com>
Date: Thu, 18 Oct 2018 06:27:15 +0000 (+0800)
Subject: igb_uio: fix unexpected removal for hot-unplug
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=70efa4116420b6f7a0734711dd603d3024366c79;p=dpdk.git

igb_uio: fix unexpected removal for hot-unplug

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@intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
---

diff --git a/kernel/linux/igb_uio/igb_uio.c b/kernel/linux/igb_uio/igb_uio.c
index fede66cf27..3cf394bdf7 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);
 	uio_unregister_device(&udev->info);
 	igbuio_pci_release_iomem(&udev->info);