netdev - Re: [PATCH net-next 5/7] net/rds: Set fr_state only to FRMR_IS_FREE if IB_WR_LOCAL

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Date:   Mon, 1 Jul 2019 13:14:54 -0700
From:   santosh.shilimkar@...cle.com
To:     Gerd Rausch <gerd.rausch@...cle.com>, netdev@...r.kernel.org
Cc:     David Miller <davem@...emloft.net>
Subject: Re: [PATCH net-next 5/7] net/rds: Set fr_state only to FRMR_IS_FREE
 if IB_WR_LOCAL_INV had been successful

On 7/1/19 9:40 AM, Gerd Rausch wrote:
> Fix a bug where fr_state first goes to FRMR_IS_STALE, because of a failure
> of operation IB_WR_LOCAL_INV, but then gets set back to "FRMR_IS_FREE"
> uncoditionally, even though the operation failed.
> 
> Signed-off-by: Gerd Rausch <gerd.rausch@...cle.com>
> ---
>   net/rds/ib_frmr.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/net/rds/ib_frmr.c b/net/rds/ib_frmr.c
> index 3c953034dca3..a5d8f4128515 100644
> --- a/net/rds/ib_frmr.c
> +++ b/net/rds/ib_frmr.c
> @@ -328,7 +328,8 @@ void rds_ib_mr_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc)
>   	}
>   
>   	if (frmr->fr_inv) {
> -		frmr->fr_state = FRMR_IS_FREE;
> +		if (frmr->fr_state == FRMR_IS_INUSE)
> +			frmr->fr_state = FRMR_IS_FREE;
>   		frmr->fr_inv = false;
>   		wake_up(&frmr->fr_inv_done);
>   	}
> 
Looks good to me. Will add this to other fixes.