From: Ganapathi Bhat <gbhat@marvell.com>
To: Brian Norris <briannorris@chromium.org>
Cc: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
"Cathy Luo" <cluo@marvell.com>, Zhiyuan Yang <yangzy@marvell.com>,
James Cao <jcao@marvell.com>, Rakesh Parmar <rakeshp@marvell.com>,
Dmitry Vyukov <dvyukov@google.com>
Subject: RE: [EXT] Re: [PATCH] mwifiex: avoid deleting uninitialized timer during USB cleanup
Date: Wed, 2 Oct 2019 14:25:53 +0000 [thread overview]
Message-ID: <MN2PR18MB2637A80D365B8B68E8216CA0A09C0@MN2PR18MB2637.namprd18.prod.outlook.com> (raw)
In-Reply-To: <20190614011648.GA121099@google.com>
Hi Brian,
Sorry for delayed response;
> > @@ -1348,6 +1348,8 @@ static void mwifiex_usb_cleanup_tx_aggr(struct
> > mwifiex_adapter *adapter)
> >
> > for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
> > port = &card->port[idx];
> > + if (!port->tx_data_ep)
> > + continue;
>
> It's not clear to me what this is about. Are you sure you're not just cleaning
> stuff up in the wrong order?
OK;
>
> > if (adapter->bus_aggr.enable)
> > while ((skb_tmp =
> > skb_dequeue(&port->tx_aggr.aggr_list)))
>
> ...
>
> > @@ -1584,7 +1580,29 @@ static void
> mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
> > return 0;
> > }
> >
> > +static int mwifiex_init_usb(struct mwifiex_adapter *adapter) {
> > + struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
> > + int ret = 0;
> > +
> > + if (card->usb_boot_state == USB8XXX_FW_DNLD)
> > + return 0;
>
> This looks wrong. You don't want to skip your basic initialization just because
> firmware isn't loaded yet. In fact, init_if() always gets called before FW init,
> so haven't you basically stubbed out this function most of the time?
I think, we are not skipping the basic initialization:
original flow:
PID_1: mwifiex_usb_probe >>> "do driver initialization" >>> "download the firmware"
PID_2: mwifiex_usb_probe >>> "do driver initialization" >>> "do interface initialization" >>> "do firmware initialization"
new flow:
PID_1: mwifiex_usb_probe >>> "do driver initialization" >>> "download the firmware"
PID_2: mwifiex_usb_probe >>> "do interface initialization" >>> "do driver initialization" >>> "do firmware initialization"
>
> I guess the question is: is this step supposed to go before, or after firmware
> initilization? Based on that answer, we can make an appropriate patch.
It was before firmware initialization, in the existing driver( and the new change also follows this);
>
> (The original code does this after FW initialization, and now you're only sort
> of moving it before.)
I don't think so; as per the above flow, things which we moved to init_if() were previously done in mwifiex_usb_dnld_fw(),
just before it return(for PID_2); FW initialization (mwifiex_init_fw()) happens after that;
Regards,
Ganapathi
prev parent reply other threads:[~2019-10-02 14:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-12 15:54 [PATCH] mwifiex: avoid deleting uninitialized timer during USB cleanup Ganapathi Bhat
2019-06-14 1:16 ` Brian Norris
2019-10-02 14:25 ` Ganapathi Bhat [this message]
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