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From: Hayes Wang <hayeswang@realtek.com>
To: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	nic_swsd <nic_swsd@realtek.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Subject: RE: [PATCH net-next 4/5] r8152: support skb_add_rx_frag
Date: Wed, 7 Aug 2019 04:34:24 +0000
Message-ID: <0835B3720019904CB8F7AA43166CEEB2F18D04FF@RTITMBSVM03.realtek.com.tw> (raw)
In-Reply-To: <20190806150802.72e0ef02@cakuba.netronome.com>

Jakub Kicinski [mailto:jakub.kicinski@netronome.com]
> Sent: Wednesday, August 07, 2019 6:08 AM
[...]
> >  #define RTL8152_REQT_READ	0xc0
> > @@ -720,7 +723,7 @@ struct r8152 {
> >  	struct net_device *netdev;
> >  	struct urb *intr_urb;
> >  	struct tx_agg tx_info[RTL8152_MAX_TX];
> > -	struct list_head rx_info;
> > +	struct list_head rx_info, rx_used;
> 
> I don't see where entries on the rx_used list get freed when driver is
> unloaded, could you explain how that's taken care of?

When the driver is unloaded, all rx_agg would be freed from
info_list list.

The info_list includes all rx_agg buffers which may be idle
or be busy. The rx_done and rx_use are used to determine
the status of rx_agg buffer included in info_list.

info_list: the rx_agg buffer would be inserted in this list
	   when it is allocated.
rx_done: the rx_agg buffer is ready (contains rx data). Or
	 it needs to be resubmitted.
rx_use: the rx_agg buffer is busy and couldn't be submitted
	yet.


Best Regards,
Hayes



  reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-06 11:17 [PATCH net-next 0/5] RX improve Hayes Wang
2019-08-06 11:18 ` [PATCH net-next 1/5] r8152: separate the rx buffer size Hayes Wang
2019-08-06 11:18 ` [PATCH net-next 2/5] r8152: replace array with linking list for rx information Hayes Wang
2019-08-06 19:53   ` Jakub Kicinski
2019-08-06 21:40     ` Jakub Kicinski
2019-08-07  4:34     ` Hayes Wang
2019-08-07 18:21       ` Jakub Kicinski
2019-08-06 11:18 ` [PATCH net-next 3/5] r8152: use alloc_pages for rx buffer Hayes Wang
2019-08-06 11:18 ` [PATCH net-next 4/5] r8152: support skb_add_rx_frag Hayes Wang
2019-08-06 22:08   ` Jakub Kicinski
2019-08-07  4:34     ` Hayes Wang [this message]
2019-08-06 11:18 ` [PATCH net-next 5/5] r8152: change rx_frag_head_sz and rx_max_agg_num dynamically Hayes Wang
2019-08-06 22:10   ` Jakub Kicinski
2019-08-07  7:12     ` Hayes Wang
2019-08-07 12:43       ` Maciej Fijalkowski
2019-08-08  1:40         ` Hayes Wang
2019-08-08  8:52     ` Hayes Wang
2019-08-08 11:49       ` Maciej Fijalkowski
2019-08-08 12:16         ` Hayes Wang
2019-08-08 18:43           ` Jakub Kicinski
2019-08-09  3:38             ` Hayes Wang
2019-08-09  4:51               ` David Miller

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