linux-kernel - Re: usb: gadget: function: f_rndis:use dev_kfree_skb_irq instead of dev_kfree

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Message-ID: <20171222085603.GB18475@kroah.com>
Date:   Fri, 22 Dec 2017 09:56:03 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "lpc.li" <lpc.li@...wei.com>
Cc:     balbi@...nel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, lidongpo@...ilicon.com
Subject: Re: usb: gadget: function: f_rndis:use dev_kfree_skb_irq instead of
 dev_kfree_skb

On Fri, Dec 22, 2017 at 04:44:48PM +0800, lpc.li wrote:
> We can't use kfree_skb in irq disable context, because spin_lock_irqsave
> make sure we are always in irq disable context, use dev_kfree_skb_irq
> instead of kfree_skb is better than dev_kfree_skb_any.

Ok, but your patch uses:

>  -   dev_kfree_skb(skb);
>  +   dev_kfree_skb_any(skb);

the _any call, not _irq, did you test this?

thanks,

greg k-h