Re: [RFC PATCH v2 2/6] hv_sock: always return ENOMEM in case of error

[Stefano Garzarella <sgarzare@xxxxxxxxxx>]

On Fri, Nov 25, 2022 at 05:05:53PM +0000, Arseniy Krasnov wrote:
> From: Bobby Eshleman <bobby.eshleman@xxxxxxxxxxxxx>
>
> This saves original behaviour from af_vsock.c - switch any error
> code returned from transport layer to ENOMEM.
>
> Signed-off-by: Bobby Eshleman <bobby.eshleman@xxxxxxxxxxxxx>
> Signed-off-by: Arseniy Krasnov <AVKrasnov@xxxxxxxxxxxxxx>
> ---
> net/vmw_vsock/hyperv_transport.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
> index 59c3e2697069..fbbe55133da2 100644
> --- a/net/vmw_vsock/hyperv_transport.c
> +++ b/net/vmw_vsock/hyperv_transport.c
> @@ -687,7 +687,7 @@ static ssize_t hvs_stream_enqueue(struct vsock_sock *vsk, struct msghdr *msg,
> 	if (bytes_written)
> 		ret = bytes_written;
> 	kfree(send_buf);
> -	return ret;
> +	return ret < 0 ? -ENOMEM : ret;

I'm not sure for hyperv we want to preserve -ENOMEM. This transport was 
added after virtio-vsock, so I think we can return the error directly.

@Dexuan what do you think?

Thanks,
Stefano