linux-kernel - Re: [PATCH] RDMA/core: Set sgtable nents when using ib_dma_virt_map

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Message-ID: <5eec6b1b-726e-b26d-bd82-f03fd5462b8f@acm.org>
Date:   Wed, 13 Oct 2021 11:33:36 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Logan Gunthorpe <logang@...tatee.com>, linux-rdma@...r.kernel.org,
        Jason Gunthorpe <jgg@...pe.ca>
Cc:     linux-kernel@...r.kernel.org, Doug Ledford <dledford@...hat.com>
Subject: Re: [PATCH] RDMA/core: Set sgtable nents when using
 ib_dma_virt_map_sg()

On 10/13/21 9:59 AM, Logan Gunthorpe wrote:
> ib_dma_map_sgtable_attrs() should be mapping the sgls and setting nents
> but the ib_uses_virt_dma() path falls back to ib_dma_virt_map_sg()
> which will not set the nents in the sgtable.
> 
> Check the return value (per the map_sg calling convention) and set
> sgt->nents appropriately on success.
> 
> Link: https://lore.kernel.org/all/996fa723-18ef-d35b-c565-c9cb9dc2d5e1@acm.org/T/#u
> Reported-by: Bart Van Assche <bvanassche@....org>
> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
> Tested-by: Bart Van Assche <bvanassche@....org>

Does this patch need a "Fixes:" tag?

Thanks,

Bart.