netdev - Re: [PATCH 1/1] RDMA/mana_ib: Add EQ interrupt support to mana ib driver.

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Date: Mon, 5 Jun 2023 10:35:09 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Simon Horman <simon.horman@...igine.com>
Cc: Wei Hu <weh@...rosoft.com>, netdev@...r.kernel.org,
	linux-hyperv@...r.kernel.org, linux-rdma@...r.kernel.org,
	longli@...rosoft.com, sharmaajay@...rosoft.com, leon@...nel.org,
	kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
	decui@...rosoft.com, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, vkuznets@...hat.com,
	ssengar@...ux.microsoft.com, shradhagupta@...ux.microsoft.com
Subject: Re: [PATCH 1/1] RDMA/mana_ib: Add EQ interrupt support to mana ib
 driver.

On Mon, Jun 05, 2023 at 03:15:05PM +0200, Simon Horman wrote:
> On Mon, Jun 05, 2023 at 11:43:13AM +0000, Wei Hu wrote:
> > Add EQ interrupt support for mana ib driver. Allocate EQs per ucontext
> > to receive interrupt. Attach EQ when CQ is created. Call CQ interrupt
> > handler when completion interrupt happens. EQs are destroyed when
> > ucontext is deallocated.
> > 
> > The change calls some public APIs in mana ethernet driver to
> > allocate EQs and other resources. Ehe EQ process routine is also shared
> > by mana ethernet and mana ib drivers.
> > 
> > Co-developed-by: Ajay Sharma <sharmaajay@...rosoft.com>
> > Signed-off-by: Ajay Sharma <sharmaajay@...rosoft.com>
> > Signed-off-by: Wei Hu <weh@...rosoft.com>
> 
> ...
> 
> > @@ -368,6 +420,24 @@ static int mana_ib_create_qp_raw(struct ib_qp *ibqp, struct ib_pd *ibpd,
> >  	qp->sq_id = wq_spec.queue_index;
> >  	send_cq->id = cq_spec.queue_index;
> >  
> > +	if (gd->gdma_context->cq_table[send_cq->id] == NULL) {
> > +
> > +		gdma_cq = kzalloc(sizeof(*gdma_cq), GFP_KERNEL);
> > +		if (!gdma_cq) {
> > +			pr_err("failed to allocate gdma_cq\n");
> 
> Hi wei Hu,
> 
> I think 'err = -ENOMEM' is needed here.

And no prints like that in drivers.

Jason