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References: <20210513122220.313465-1-szymon.janc@codecoup.pl>
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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date:   Thu, 13 May 2021 13:34:47 -0700
Message-ID: <CABBYNZLCBW3O21re8hnZ2PyGRWoWZA7vCFYA2yscsDM0Y7oR0w@mail.gmail.com>
Subject: Re: [PATCH v2] Bluetooth: Remove spurious error message
To:     Szymon Janc <szymon.janc@codecoup.pl>
Cc:     "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>,
        stable@vger.kernel.org
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Hi Szymon,

On Thu, May 13, 2021 at 1:23 PM Szymon Janc <szymon.janc@codecoup.pl> wrote:
>
> Even with rate limited reporting this is very spammy and since
> it is remote device that is providing bogus data there is no
> need to report this as error.
>
> Since real_len variable was used only to allow conditional error
> message it is now also removed.
>
> [72454.143336] bt_err_ratelimited: 10 callbacks suppressed
> [72454.143337] Bluetooth: hci0: advertising data len corrected
> [72454.296314] Bluetooth: hci0: advertising data len corrected
> [72454.892329] Bluetooth: hci0: advertising data len corrected
> [72455.051319] Bluetooth: hci0: advertising data len corrected
> [72455.357326] Bluetooth: hci0: advertising data len corrected
> [72455.663295] Bluetooth: hci0: advertising data len corrected
> [72455.787278] Bluetooth: hci0: advertising data len corrected
> [72455.942278] Bluetooth: hci0: advertising data len corrected
> [72456.094276] Bluetooth: hci0: advertising data len corrected
> [72456.249137] Bluetooth: hci0: advertising data len corrected
> [72459.416333] bt_err_ratelimited: 13 callbacks suppressed
> [72459.416334] Bluetooth: hci0: advertising data len corrected
> [72459.721334] Bluetooth: hci0: advertising data len corrected
> [72460.011317] Bluetooth: hci0: advertising data len corrected
> [72460.327171] Bluetooth: hci0: advertising data len corrected
> [72460.638294] Bluetooth: hci0: advertising data len corrected
> [72460.946350] Bluetooth: hci0: advertising data len corrected
> [72461.225320] Bluetooth: hci0: advertising data len corrected
> [72461.690322] Bluetooth: hci0: advertising data len corrected
> [72462.118318] Bluetooth: hci0: advertising data len corrected
> [72462.427319] Bluetooth: hci0: advertising data len corrected
> [72464.546319] bt_err_ratelimited: 7 callbacks suppressed
> [72464.546319] Bluetooth: hci0: advertising data len corrected
> [72464.857318] Bluetooth: hci0: advertising data len corrected
> [72465.163332] Bluetooth: hci0: advertising data len corrected
> [72465.278331] Bluetooth: hci0: advertising data len corrected
> [72465.432323] Bluetooth: hci0: advertising data len corrected
> [72465.891334] Bluetooth: hci0: advertising data len corrected
> [72466.045334] Bluetooth: hci0: advertising data len corrected
> [72466.197321] Bluetooth: hci0: advertising data len corrected
> [72466.340318] Bluetooth: hci0: advertising data len corrected
> [72466.498335] Bluetooth: hci0: advertising data len corrected
> [72469.803299] bt_err_ratelimited: 10 callbacks suppressed
>
> Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>
Reviewed-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
> Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=203753
> Cc: stable@vger.kernel.org
> ---
>  net/bluetooth/hci_event.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
>
> diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
> index 5e99968939ce..26846d338fa7 100644
> --- a/net/bluetooth/hci_event.c
> +++ b/net/bluetooth/hci_event.c
> @@ -5441,7 +5441,7 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
>         struct hci_conn *conn;
>         bool match;
>         u32 flags;
> -       u8 *ptr, real_len;
> +       u8 *ptr;
>
>         switch (type) {
>         case LE_ADV_IND:
> @@ -5472,14 +5472,8 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
>                         break;
>         }
>
> -       real_len = ptr - data;
> -
>         /* Adjust for actual length */
> -       if (len != real_len) {
> -               bt_dev_err_ratelimited(hdev, "advertising data len corrected %u -> %u",
> -                                      len, real_len);
> -               len = real_len;
> -       }
> +       len = ptr - data;
>
>         /* If the direct address is present, then this report is from
>          * a LE Direct Advertising Report event. In that case it is
> --
> 2.31.1
>


-- 
Luiz Augusto von Dentz