From: Jakub Kicinski <kuba@kernel.org>
To: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: "peppe.cavallaro@st.com" <peppe.cavallaro@st.com>,
"alexandre.torgue@st.com" <alexandre.torgue@st.com>,
"joabreu@synopsys.com" <joabreu@synopsys.com>,
"davem@davemloft.net" <davem@davemloft.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
dl-linux-imx <linux-imx@nxp.com>
Subject: Re: [PATCH V4 net 5/5] net: stmmac: re-init rx buffers when mac resume back
Date: Mon, 22 Feb 2021 11:47:37 -0800 [thread overview]
Message-ID: <20210222114737.740469eb@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> (raw)
In-Reply-To: <DB8PR04MB67953DBABBB9B1B85759AE58E6839@DB8PR04MB6795.eurprd04.prod.outlook.com>
On Sat, 20 Feb 2021 07:52:46 +0000 Joakim Zhang wrote:
> > I'm not sure why you recycle and reallocate every buffer. Isn't it enough to
> > reinitialize the descriptors with the buffers which are already allocated?
>
> As I know, the receive buffer address is not fixed after allocated,
> it will recycle and re-allocate in stmmac_rx(), where to handle the
> receive buffers.
Not sure what you mean by that. The driver must know the addresses of
the memory it allocated and handed over to the device.
> It should be enough to re-initialize the descriptors with the buffers
> if it is possible. Could you point me how to do it?
next prev parent reply other threads:[~2021-02-22 19:48 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-04 11:21 [PATCH V4 net 0/5] ethernet: fixes for stmmac driver Joakim Zhang
2021-02-04 11:21 ` [PATCH V4 net 1/5] net: stmmac: stop each tx channel independently Joakim Zhang
2021-02-04 11:21 ` [PATCH V4 net 2/5] net: stmmac: fix watchdog timeout during suspend/resume stress test Joakim Zhang
2021-02-04 11:21 ` [PATCH V4 net 3/5] net: stmmac: fix dma physical address of descriptor when display ring Joakim Zhang
2021-02-06 20:29 ` Jakub Kicinski
2021-02-20 7:43 ` Joakim Zhang
2021-02-22 19:46 ` Jakub Kicinski
2021-02-23 7:10 ` Joakim Zhang
2021-02-04 11:21 ` [PATCH V4 net 4/5] net: stmmac: fix wrongly set buffer2 valid when sph unsupport Joakim Zhang
2021-02-04 11:21 ` [PATCH V4 net 5/5] net: stmmac: re-init rx buffers when mac resume back Joakim Zhang
2021-02-06 20:38 ` Jakub Kicinski
2021-02-20 7:52 ` Joakim Zhang
2021-02-22 19:47 ` Jakub Kicinski [this message]
2021-02-23 7:16 ` Joakim Zhang
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