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From:   Hayes Wang <hayeswang@realtek.com>
To:     Douglas Anderson <dianders@chromium.org>,
        Jakub Kicinski <kuba@kernel.org>,
        "David S . Miller" <davem@davemloft.net>
CC:     Laura Nao <laura.nao@collabora.com>,
        Edward Hill <ecgh@chromium.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Grant Grundler <grundler@chromium.org>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        Simon Horman <horms@kernel.org>,
        =?iso-8859-1?Q?Bj=F8rn_Mork?= <bjorn@mork.no>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: RE: [PATCH net v2 2/5] r8152: Add RTL8152_INACCESSIBLE checks to more loops
Thread-Topic: [PATCH net v2 2/5] r8152: Add RTL8152_INACCESSIBLE checks to
 more loops
Thread-Index: AQHaIkOFTo2WdNHKX0+EoLHKjZ89lbCRNJBw
Date:   Wed, 29 Nov 2023 12:47:31 +0000
Message-ID: <d6f843b90b7146059332c82159ba79ff@realtek.com>
References: <20231128133811.net.v2.1.I77097aa9ec01aeca1b3c75fde4ba5007a17fdf76@changeid>
 <20231128133811.net.v2.2.I79c8a6c8cafd89979af5407d77a6eda589833dca@changeid>
In-Reply-To: <20231128133811.net.v2.2.I79c8a6c8cafd89979af5407d77a6eda589833dca@changeid>
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Douglas Anderson <dianders@chromium.org>
> Sent: Wednesday, November 29, 2023 5:38 AM
[...]
> @@ -3000,6 +3000,8 @@ static void rtl8152_nic_reset(struct r8152 *tp)
>                 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CR, CR_RST);
> 
>                 for (i = 0; i < 1000; i++) {
> +                       if (test_bit(RTL8152_INACCESSIBLE, &tp->flags))
> +                               return;
>                         if (!(ocp_read_byte(tp, MCU_TYPE_PLA, PLA_CR) & CR_RST))
>                                 break;
>                         usleep_range(100, 400);
> @@ -3329,6 +3331,8 @@ static void rtl_disable(struct r8152 *tp)
>         rxdy_gated_en(tp, true);
> 
>         for (i = 0; i < 1000; i++) {
> +               if (test_bit(RTL8152_INACCESSIBLE, &tp->flags))
> +                       return;

I think you have to replace return with break.
Otherwise, rtl_stop_rx() wouldn't be called.
And, you may free the memory which is using, when rtl8152_close () is called.

>                 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
>                 if ((ocp_data & FIFO_EMPTY) == FIFO_EMPTY)
>                         break;
> @@ -3336,6 +3340,8 @@ static void rtl_disable(struct r8152 *tp)
>         }
> 
>         for (i = 0; i < 1000; i++) {
> +               if (test_bit(RTL8152_INACCESSIBLE, &tp->flags))
> +                       return;

Same as above.

>                 if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_TCR0) & TCR0_TX_EMPTY)
>                         break;
>                 usleep_range(1000, 2000);
> @@ -5499,6 +5505,8 @@ static void wait_oob_link_list_ready(struct r8152 *tp)
>         int i;
> 
>         for (i = 0; i < 1000; i++) {
> +               if (test_bit(RTL8152_INACCESSIBLE, &tp->flags))
> +                       return;
>                 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
>                 if (ocp_data & LINK_LIST_READY)
>                         break;
> --

Best Regards,
Hayes