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Re: [PATCH] cfg80211: remove @gfp parameter from cfg80211_rx_mgmt()

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On Tue, 2014-08-12 at 10:24 +0200, Arend van Spriel wrote:
> On 08/11/2014 04:57 PM, Johannes Berg wrote:
> > On Mon, 2014-08-11 at 03:29 -0700, Vladimir Kondratiev wrote:
> >> In the cfg80211_rx_mgmt(), parameter @gfp was used for the memory allocation.
> >> But, memory get allocated under spin_lock_bh(), this implies atomic context.
> >> So, one can't use GFP_KERNEL, only variants with no __GFP_WAIT. Actually, in all
> >> occurrences GFP_ATOMIC is used (wil6210 use GFP_KERNEL by mistake),
> >> and it should be this way or warning triggered in the memory allocation code.
> >>
> >> Remove @gfp parameter as no actual choice exist, and use hard coded
> >> GFP_ATOMIC for memory allocation.
> 
> When I saw the patch I quickly checked and noticed brcmfmac using 
> GFP_ATOMIC. However, looking at bit closer into this it turns out that 
> the cfg80211_rx_mgmt() call could be done with GFP_KERNEL flag in 
> brcmfmac. I leave it to you what to do here :-p

Sorry - I'm confused - what do you mean?

johannes

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