can: ems_usb: Improved memory handling on ems_usb_start

Do not return from ems_usb_start if allocation fails. If not all URBs
could be allocated use the one already submitted.

Signed-off-by: Sebastian Haas <dev@sebastianhaas.info>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c
index 7dae64d44e83..9783e02fbc26 100644
--- a/drivers/net/can/usb/ems_usb.c
+++ b/drivers/net/can/usb/ems_usb.c
@@ -607,7 +607,8 @@ static int ems_usb_start(struct ems_usb *dev)
                 if (!urb) {
                         dev_err(netdev->dev.parent,
                                 "No memory left for URBs\n");
-                        return -ENOMEM;
+                        err = -ENOMEM;
+                        break;
                 }
 
                 buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE, GFP_KERNEL,
@@ -616,7 +617,8 @@ static int ems_usb_start(struct ems_usb *dev)
                         dev_err(netdev->dev.parent,
                                 "No memory left for USB buffer\n");
                         usb_free_urb(urb);
-                        return -ENOMEM;
+                        err = -ENOMEM;
+                        break;
                 }
 
                 usb_fill_bulk_urb(urb, dev->udev, usb_rcvbulkpipe(dev->udev, 2),