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From: Christoph Hellwig <hch@lst.de>
To: Varun Prakash <varun@chelsio.com>
Cc: sagi@grimberg.me, hch@lst.de, linux-nvme@lists.infradead.org
Subject: Re: [PATCH] nvmet-tcp: fix data digest pointer calculation
Date: Wed, 27 Oct 2021 07:57:25 +0200	[thread overview]
Message-ID: <20211027055725.GA9635@lst.de> (raw)
In-Reply-To: <1635182214-3958-1-git-send-email-varun@chelsio.com>

On Mon, Oct 25, 2021 at 10:46:54PM +0530, Varun Prakash wrote:
> exp_ddgst is of type __le32, &cmd->exp_ddgst + cmd->offset
> increases &cmd->exp_ddgst by 4 * cmd->offset, fix this by
> type casting &cmd->exp_ddgst to u8 *.
> 
> Fixes: 872d26a391da ("nvmet-tcp: add NVMe over TCP target driver")
> Signed-off-by: Varun Prakash <varun@chelsio.com>
> ---
>  drivers/nvme/target/tcp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
> index 07ee347..d641bfa 100644
> --- a/drivers/nvme/target/tcp.c
> +++ b/drivers/nvme/target/tcp.c
> @@ -702,7 +702,7 @@ static int nvmet_try_send_ddgst(struct nvmet_tcp_cmd *cmd, bool last_in_batch)
>  	struct nvmet_tcp_queue *queue = cmd->queue;
>  	struct msghdr msg = { .msg_flags = MSG_DONTWAIT };
>  	struct kvec iov = {
> -		.iov_base = &cmd->exp_ddgst + cmd->offset,
> +		.iov_base = (u8 *)&cmd->exp_ddgst + cmd->offset,

Wouldn't be the better fix to divide cmd->offset by 4 instead of the
casts?  I can fix this up inline if that is ok.


  parent reply	other threads:[~2021-10-27  5:57 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-25 17:16 [PATCH] nvmet-tcp: fix data digest pointer calculation Varun Prakash
2021-10-26 13:24 ` Sagi Grimberg
2021-10-27  5:57 ` Christoph Hellwig [this message]
2021-10-27  7:11   ` Sagi Grimberg
2021-10-27  7:13     ` Christoph Hellwig
2021-10-27  9:49       ` Sagi Grimberg
2021-10-27 14:49         ` Varun Prakash
2021-10-28  8:26           ` Sagi Grimberg
2021-10-28 10:49             ` Varun Prakash
2021-10-28 14:00               ` Christoph Hellwig
2021-10-28 14:07                 ` Sagi Grimberg
2021-10-27 21:37 ` Keith Busch

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