linux-kernel - Re: [Outreachy kernel] Re: [PATCH] staging: irda: Replace printk() with appropriate net_*macro

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Date:   Mon, 5 Mar 2018 22:03:20 +0100 (CET)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Arushi Singhal <arushisinghal19971997@...il.com>
cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        driverdevel <devel@...verdev.osuosl.org>,
        outreachy-kernel@...glegroups.com,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Outreachy kernel] Re: [PATCH] staging: irda: Replace printk()
 with appropriate net_*macro_ratelimited()



On Mon, 5 Mar 2018, Arushi Singhal wrote:

>
>
> On Mon, Mar 5, 2018 at 3:33 PM, Dan Carpenter <dan.carpenter@...cle.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@...il.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.

julia