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SubjectRe: [Outreachy kernel] Re: [PATCH] staging: irda: Replace printk() with appropriate net_*macro_ratelimited()
On Tue, Mar 6, 2018 at 2:33 AM, Julia Lawall <julia.lawall@lip6.fr> wrote:
>
>
> On Mon, 5 Mar 2018, Arushi Singhal wrote:
>
>>
>>
>> On Mon, Mar 5, 2018 at 3:33 PM, Dan Carpenter <dan.carpenter@oracle.com> wrote:
>> On Mon, Mar 05, 2018 at 04:02:06AM +0530, Arushi Singhal wrote:
>> > Replace printk having a log level with the appropriate
>> > net_*macro_ratelimited.
>> > It's better to use actual device name as a prefix in error messages.
>> > Indentation is also changed, to fix the checkpatch issue if line is not
>> > exceding 80 characters.
>> >
>> > Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
>> > ---
>> > .../rtl8192u/ieee80211/ieee80211_crypt_ccmp.c | 22 +++++++++++-----------
>> > 1 file changed, 11 insertions(+), 11 deletions(-)
>> >
>> > diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c
>> > index e6648f7..200fe5f 100644
>> > --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c
>> > +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c
>> > @@ -73,7 +73,7 @@ static void *ieee80211_ccmp_init(int key_idx)
>> >
>> > priv->tfm = (void *)crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
>> > if (IS_ERR(priv->tfm)) {
>> > - printk(KERN_DEBUG "ieee80211_crypt_ccmp: could not allocate crypto API aes\n");
>> > + net_dbg_ratelimited("ieee80211_crypt_ccmp: could not allocate crypto API aes\n");
>>
>>
>> This should probably just be deleted.
>>
>> Hello Dan
>> Why we should make this change?
>> According to me it's use here to print debug message.
>> Wanted to know more about your thought on this.
>>
>> > priv->tfm = NULL;
>> > goto fail;
>> > }
>> > @@ -276,22 +276,22 @@ static int ieee80211_ccmp_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
>> > keyidx = pos[3];
>> > if (!(keyidx & (1 << 5))) {
>> > if (net_ratelimit()) {
>> > - printk(KERN_DEBUG "CCMP: received packet without ExtIV flag from %pM\n",
>> > - hdr->addr2);
>> > + net_dbg_ratelimited("CCMP: received packet without ExtIV flag from %pM\n",
>> > + hdr->addr2);
>> > }
>>
>> The "if (net_ratelimit()) " already means the message is ratelimited so
>> it's net_dbg() ok? I think so, but I've never looked at this before.
>>
>>
>> net_dbg() is an implicit declaration of a function. So we can't do this change.
>
> Perhaps you can add the header file that declares net_dbg.

Hi Julia

There is such header file which declares net_dbg.
We can use dev_dbg() for all struct device object.
We can use netdev_dbg() for all struct netdevice object.
For net subsystem when there is no struct device object we can go with
net_dbg_ratelimited (preferred) or pr_debug.

I have understood this from my readings. If I am wrong somewhere
please correct me.

Thanks
Arushi

>
> julia
>
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