when the hot plug out of the device, the uio resource have been
invalid, so to avoid the system hung, no need to do the invalid
operation in igb_uio pci release function.

Signed-off-by: Jeff Guo <jia....@intel.com>
---
 lib/librte_eal/linuxapp/igb_uio/igb_uio.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c 
b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index a3a98c1..d0e07b4 100644
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -354,6 +354,12 @@ igbuio_pci_release(struct uio_info *info, struct inode 
*inode)
        struct rte_uio_pci_dev *udev = info->priv;
        struct pci_dev *dev = udev->pdev;
 
+       /* check if device have been remove before release */
+       if ((&dev->dev.kobj)->state_remove_uevent_sent == 1) {
+               pr_info("The device have been removed\n");
+               return -1;
+       }
+
        /* disable interrupts */
        igbuio_pci_disable_interrupts(udev);
 
-- 
2.7.4

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