Re: [PATCH net-next] qed: Set error code for allocation failures

[Kalderon, Michal]

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Sent: Friday, October 27, 2017 2:52 PM

>On Fri, Oct 27, 2017 at 05:32:42PM +0800, Yunsheng Lin wrote:
>> >     iwarp_info = &p_hwfn->p_rdma_info->iwarp;
>> > @@ -2696,6 +2696,7 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
>> >     if (rc)
>> >             goto err;
>> >
>> > +   rc = -ENOMEM;
>> >     iwarp_info->partial_fpdus = kcalloc((u16)p_hwfn->p_rdma_info->num_qps,
>> >                                         sizeof(*iwarp_info->partial_fpdus),
>> >                                         GFP_KERNEL);
>>
>> Does the memory allocated here need to be freed when error happens below?
>>
>
>Hm...  I think you're right that it leaks.  Also I'm confused by the
>qed_iwarp_ll2_alloc_buffers() allocation.  The comment in there says
>that /* buffers will be deallocated by qed_ll2 */ but qed_ll2 is not
>a function name or something which is useful to grep.

Thanks Dan, partial_fpdus is released during qed_iwarp_resc_free, called from qed_rdma_resc_free
called on qed_rdma_stop and on failure during qed_rdma_start.
Regarding ll2 buffers. For each successfully allocated buffer we call
qed_iwarp_ll2_post_rx->qed_ll2_post_rx_buffer.
These buffers will get released and freed when we call qed_ll2_terminate_connection
called from qed_iwarp_ll2_stop ( which is called during qed_iwarp_ll2_start on error ).
thanks,
Michal