linux-kernel - Re: [PATCH net] RDMA/mana_ib: fix a bug in calculating the wrong page table index when 64kb page table is used

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Message-ID: <20240829102425.GD26654@unreal>
Date: Thu, 29 Aug 2024 13:24:25 +0300
From: Leon Romanovsky <leon@...nel.org>
To: longli@...rosoft.com
Cc: Jason Gunthorpe <jgg@...pe.ca>, Ajay Sharma <sharmaajay@...rosoft.com>,
	Konstantin Taranov <kotaranov@...rosoft.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH net] RDMA/mana_ib: fix a bug in calculating the wrong
 page table index when 64kb page table is used

On Wed, Aug 28, 2024 at 01:06:08PM -0700, longli@...uxonhyperv.com wrote:
> From: Long Li <longli@...rosoft.com>
> 
> MANA hardware uses 4k page size. When calculating the page table index,
> it should use the hardware page size, not the system page size.
> 
> Cc: stable@...r.kernel.org
> Fixes: 0266a177631d ("RDMA/mana_ib: Add a driver for Microsoft Azure Network Adapter")
> Signed-off-by: Long Li <longli@...rosoft.com>
> ---
>  drivers/infiniband/hw/mana/main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

These two patches are RDMA ones, please fix the target tree, rephrase
the commit title to simplify it and resend.

Thanks

> 
> diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
> index d13abc954d2a..f68f54aea820 100644
> --- a/drivers/infiniband/hw/mana/main.c
> +++ b/drivers/infiniband/hw/mana/main.c
> @@ -383,7 +383,7 @@ static int mana_ib_gd_create_dma_region(struct mana_ib_dev *dev, struct ib_umem
>  
>  	create_req->length = umem->length;
>  	create_req->offset_in_page = ib_umem_dma_offset(umem, page_sz);
> -	create_req->gdma_page_type = order_base_2(page_sz) - PAGE_SHIFT;
> +	create_req->gdma_page_type = order_base_2(page_sz) - MANA_PAGE_SHIFT;
>  	create_req->page_count = num_pages_total;
>  
>  	ibdev_dbg(&dev->ib_dev, "size_dma_region %lu num_pages_total %lu\n",
> -- 
> 2.17.1
>