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Subject: Re: [PATCH] staging:r8723bs: remove wrappers around skb_clone()
To:     Joe Perches <joe@perches.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Rasmus Villemoes <linux@rasmusvillemoes.dk>,
        Hans de Goede <hdegoede@redhat.com>,
        Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
        Nishka Dasgupta <nishkadg.linux@gmail.com>,
        Lukasz Szczesny <luk@wybcz.pl>, R Veera Kumar <vkor@vkten.in>,
        Hariprasad Kelam <hariprasad.kelam@gmail.com>,
        YueHaibing <yuehaibing@huawei.com>,
        Shobhit Kukreti <shobhitkukreti@gmail.com>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Pascal Terjan <pterjan@google.com>, devel@driverdev.osuosl.org,
        linux-kernel@vger.kernel.org
References: <20200531160843.39120-1-insafonov@gmail.com>
 <7bf8612d3708b811e026daec5c7a1486c5954905.camel@perches.com>
From:   Ivan Safonov <insafonov@gmail.com>
Message-ID: <8e4df253-e021-6c29-96ab-24eed9b61eb2@gmail.com>
Date:   Sun, 31 May 2020 20:28:10 +0300
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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.