cnic: Free UIO rings when the device is closed.

This will free up unneeded memory.

Reviewed-by: Eddie Wai <eddie.wai@broadcom.com>
Reviewed-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/cnic.c b/drivers/net/ethernet/broadcom/cnic.c
index ff3589405dce..38be4d91783b 100644
--- a/drivers/net/ethernet/broadcom/cnic.c
+++ b/drivers/net/ethernet/broadcom/cnic.c
@@ -868,6 +868,8 @@ static void cnic_free_resc(struct cnic_dev *dev)
         if (udev) {
                 udev->dev = NULL;
                 cp->udev = NULL;
+                if (udev->uio_dev == -1)
+                        __cnic_free_uio_rings(udev);
         }
 
         cnic_free_context(dev);
@@ -1039,6 +1041,11 @@ static int cnic_alloc_uio_rings(struct cnic_dev *dev, int pages)
         list_for_each_entry(udev, &cnic_udev_list, list) {
                 if (udev->pdev == dev->pcidev) {
                         udev->dev = dev;
+                        if (__cnic_alloc_uio_rings(udev, pages)) {
+                                udev->dev = NULL;
+                                read_unlock(&cnic_dev_lock);
+                                return -ENOMEM;
+                        }
                         cp->udev = udev;
                         read_unlock(&cnic_dev_lock);
                         return 0;