On Mon, Oct 04, 2021 at 01:46:01PM +0200, Daniele Palmas wrote:
> Fix double free_netdev when mhi_prepare_for_transfer fails.
>
> This is a back-port of upstream:
> commit 4526fe74c3c509 ("drivers: net: mhi: fix error path in mhi_net_newlink")
>
> Fixes: 13adac032982 ("net: mhi_net: Register wwan_ops for link creation")
> Signed-off-by: Daniele Palmas <dnlplm@xxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <mani@xxxxxxxxxx>
Thanks,
Mani
> ---
> Hello Greg,
>
> if maintainers ack, this should go just to 5.14 branch.
>
> Thanks,
> Daniele
> ---
> drivers/net/mhi/net.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/mhi/net.c b/drivers/net/mhi/net.c
> index e60e38c1f09d..5e49f7a919b6 100644
> --- a/drivers/net/mhi/net.c
> +++ b/drivers/net/mhi/net.c
> @@ -337,7 +337,7 @@ static int mhi_net_newlink(void *ctxt, struct net_device *ndev, u32 if_id,
> /* Start MHI channels */
> err = mhi_prepare_for_transfer(mhi_dev);
> if (err)
> - goto out_err;
> + return err;
>
> /* Number of transfer descriptors determines size of the queue */
> mhi_netdev->rx_queue_sz = mhi_get_free_desc_count(mhi_dev, DMA_FROM_DEVICE);
> @@ -347,7 +347,7 @@ static int mhi_net_newlink(void *ctxt, struct net_device *ndev, u32 if_id,
> else
> err = register_netdev(ndev);
> if (err)
> - goto out_err;
> + return err;
>
> if (mhi_netdev->proto) {
> err = mhi_netdev->proto->init(mhi_netdev);
> @@ -359,8 +359,6 @@ static int mhi_net_newlink(void *ctxt, struct net_device *ndev, u32 if_id,
>
> out_err_proto:
> unregister_netdevice(ndev);
> -out_err:
> - free_netdev(ndev);
> return err;
> }
>
> --
> 2.30.2
>
