DPDK: Fix a crash in igb_uio driver when the device is removed.

This crash happens because the device still has MSI configured,
the fix is to free the IRQ. Adding pending further investigation.

Change-Id: Ifcd3404fcc25fe27dcccc67d0dcf9d8f0ec18582
Signed-off-by: Todd Foggoa (tfoggoa) <tfoggoa@cisco.com>
Signed-off-by: Ray Kinsella <ray.kinsella@intel.com>

diff --git a/dpdk/dpdk-16.07_patches/0007-UIO-Fix-a-crash-in-igb_uio-driver-when-the-device-is.patch b/dpdk/dpdk-16.07_patches/0007-UIO-Fix-a-crash-in-igb_uio-driver-when-the-device-is.patch
new file mode 100644 (file)
index 0000000..07e1c9c
--- /dev/null
+++ b/dpdk/dpdk-16.07_patches/0007-UIO-Fix-a-crash-in-igb_uio-driver-when-the-device-is.patch
@@ -0,0 +1,38 @@
+From 95c2d549d8d123aac37a372580122f1b043c6165 Mon Sep 17 00:00:00 2001
+From: Ray Kinsella <ray.kinsella@intel.com>
+Date: Wed, 10 Aug 2016 11:59:07 +0100
+Subject: [PATCH] UIO: Fix a crash in igb_uio driver when the device is
+ removed.
+
+This crash happens because the device still has MSI configured,
+the fix is to free the IRQ.
+
+Signed-off-by: Todd Foggoa (tfoggoa) <tfoggoa@cisco.com>
+Signed-off-by: Ray Kinsella <ray.kinsella@intel.com>
+---
+ lib/librte_eal/linuxapp/igb_uio/igb_uio.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+index df41e45..69873e7 100644
+--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
++++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+@@ -442,8 +442,15 @@ static void
+ igbuio_pci_remove(struct pci_dev *dev)
+ {
+       struct rte_uio_pci_dev *udev = pci_get_drvdata(dev);
++      struct uio_info *info = pci_get_drvdata(dev);
+ 
+       sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp);
++
++      if (info->irq && (info->irq != UIO_IRQ_CUSTOM)){
++              free_irq(info->irq, info->uio_dev);
++              info->irq = UIO_IRQ_NONE;
++      }
++
+       uio_unregister_device(&udev->info);
+       igbuio_pci_release_iomem(&udev->info);
+       if (udev->mode == RTE_INTR_MODE_MSIX)
+-- 
+1.9.1
+