netdev - Re: [PATCH v2] staging: qlge: fix build breakage with dumping enabled

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Message-ID: <20200902140000.jcarw6eqryyergig@Rk>
Date:   Wed, 2 Sep 2020 22:00:00 +0800
From:   Coiby Xu <coiby.xu@...il.com>
To:     Benjamin Poirier <benjamin.poirier@...il.com>
Cc:     devel@...verdev.osuosl.org, Manish Chopra <manishc@...vell.com>,
        "supporter:QLOGIC QLGE 10Gb ETHERNET DRIVER" 
        <GR-Linux-NIC-Dev@...vell.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        "open list:QLOGIC QLGE 10Gb ETHERNET DRIVER" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] staging: qlge: fix build breakage with dumping enabled

On Thu, Aug 27, 2020 at 09:50:10AM +0900, Benjamin Poirier wrote:
>On 2020-08-27 07:27 +0800, Coiby Xu wrote:
>> This fixes commit 0107635e15ac
>> ("staging: qlge: replace pr_err with netdev_err") which introduced an
>> build breakage of missing `struct ql_adapter *qdev` for some functions
>> and a warning of type mismatch with dumping enabled, i.e.,
>>
>> $ make CFLAGS_MODULE="QL_ALL_DUMP=1 QL_OB_DUMP=1 QL_CB_DUMP=1 \
>>   QL_IB_DUMP=1 QL_REG_DUMP=1 QL_DEV_DUMP=1" M=drivers/staging/qlge
>>
>> qlge_dbg.c: In function ‘ql_dump_ob_mac_rsp’:
>> qlge_dbg.c:2051:13: error: ‘qdev’ undeclared (first use in this function); did you mean ‘cdev’?
>>  2051 |  netdev_err(qdev->ndev, "%s\n", __func__);
>>       |             ^~~~
>> qlge_dbg.c: In function ‘ql_dump_routing_entries’:
>> qlge_dbg.c:1435:10: warning: format ‘%s’ expects argument of type ‘char *’, but argument 3 has type ‘int’ [-Wformat=]
>>  1435 |        "%s: Routing Mask %d = 0x%.08x\n",
>>       |         ~^
>>       |          |
>>       |          char *
>>       |         %d
>>  1436 |        i, value);
>>       |        ~
>>       |        |
>>       |        int
>> qlge_dbg.c:1435:37: warning: format ‘%x’ expects a matching ‘unsigned int’ argument [-Wformat=]
>>  1435 |        "%s: Routing Mask %d = 0x%.08x\n",
>>       |                                 ~~~~^
>>       |                                     |
>>       |                                     unsigned int
>>
>> Fixes: 0107635e15ac ("staging: qlge: replace pr_err with netdev_err")
>> Reported-by: Benjamin Poirier <benjamin.poirier@...il.com>
>> Suggested-by: Benjamin Poirier <benjamin.poirier@...il.com>
>> Signed-off-by: Coiby Xu <coiby.xu@...il.com>
>> ---
>>  drivers/staging/qlge/qlge.h      | 20 ++++++++++----------
>>  drivers/staging/qlge/qlge_dbg.c  | 24 ++++++++++++++++++------
>>  drivers/staging/qlge/qlge_main.c |  8 ++++----
>>  3 files changed, 32 insertions(+), 20 deletions(-)
>>
>[...]
>> @@ -1632,6 +1635,8 @@ void ql_dump_wqicb(struct wqicb *wqicb)
>>
>>  void ql_dump_tx_ring(struct tx_ring *tx_ring)
>>  {
>> +	struct ql_adapter *qdev = tx_ring->qdev;
>> +
>>  	if (!tx_ring)
>>  		return;
>
>Given the null check for tx_ring, it seems unwise to dereference tx_ring
>before the check.
>
>Looking at ql_dump_all(), I'm not sure that the check is needed at all
>though. Maybe it should be removed.
>
>Same problem in ql_dump_rx_ring().

Thank you for the spotting this issue! I'll remove the check.

>
>>  	netdev_err(qdev->ndev, "===================== Dumping tx_ring %d ===============\n",
>> @@ -1657,6 +1662,8 @@ void ql_dump_tx_ring(struct tx_ring *tx_ring)
>>  void ql_dump_ricb(struct ricb *ricb)
>>  {
>>  	int i;
>> +	struct ql_adapter *qdev =
>> +		container_of(ricb, struct ql_adapter, ricb);
>
>Here, davem would point out that the variables are not declared in
>"reverse xmas tree" order.

I'll make davem happy then:)

--
Best regards,
Coiby