linux-kernel - Re: [PATCH] staging:r8723bs: remove wrappers around skb

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Date:   Sun, 31 May 2020 20:49:22 +0300
From:   Ivan Safonov <insafonov@...il.com>
To:     Joe Perches <joe@...ches.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Hans de Goede <hdegoede@...hat.com>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Nishka Dasgupta <nishkadg.linux@...il.com>,
        Lukasz Szczesny <luk@...cz.pl>, R Veera Kumar <vkor@...en.in>,
        Hariprasad Kelam <hariprasad.kelam@...il.com>,
        YueHaibing <yuehaibing@...wei.com>,
        Shobhit Kukreti <shobhitkukreti@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Pascal Terjan <pterjan@...gle.com>, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging:r8723bs: remove wrappers around skb_clone()

On 5/31/20 8:36 PM, Joe Perches wrote:
> On Sun, 2020-05-31 at 20:28 +0300, Ivan Safonov wrote:
>> On 5/31/20 7:15 PM, Joe Perches wrote:
>>> On Sun, 2020-05-31 at 19:08 +0300, Ivan Safonov wrote:
>>>> Wrappers around skb_clone() do not simplify the driver code.
>>> []
>>>> -inline struct sk_buff *_rtw_skb_clone(struct sk_buff *skb)
>>>> -{
>>>> -	return skb_clone(skb, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
>>>> -}
>>>> -
>>> []
>>>> diff --git a/drivers/staging/rtl8723bs/os_dep/recv_linux.c b/drivers/staging/rtl8723bs/os_dep/recv_linux.c
>>> []
>>>> @@ -110,7 +110,7 @@ void rtw_os_recv_indicate_pkt(struct adapter *padapter, _pkt *pkt, struct rx_pkt
>>>>    			if (memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN)) {
>>>>    				if (bmcast) {
>>>>    					psta = rtw_get_bcmc_stainfo(padapter);
>>>> -					pskb2 = rtw_skb_clone(pkt);
>>>> +					pskb2 = skb_clone(pkt, GFP_ATOMIC);
>>>
>>> Why make every clone allocation GFP_ATOMIC ?
>>
>> The rtw_os_recv_indicate_pkt() is always called from an interrupt handler.
> 
> It'd be better to indicate you know that in the changelog
> as the subject and changelog just shows removing wrappers
> and the patch code does not agree with that.

Yes, it's right.