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From: Kalle Valo <kalle.valo@iki.fi>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: John Linville <linville@tuxdriver.com>,
	David Miller <davem@davemloft.net>,
	Dave Young <hidave.darkstar@gmail.com>,
	linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: [PATCH] b43: fix ieee80211_rx() context
Date: Sun, 11 Oct 2009 18:59:03 +0300	[thread overview]
Message-ID: <873a5pq5vc.fsf@purkki.valot.fi> (raw)
In-Reply-To: <1255256361.4095.56.camel@johannes.local> (Johannes Berg's message of "Sun\, 11 Oct 2009 12\:19\:21 +0200")

Johannes Berg <johannes@sipsolutions.net> writes:

> Due to the way it interacts with the networking
> stack and other parts of mac80211, ieee80211_rx()
> must be called with disabled softirqs.

[...]

> +	local_bh_disable();
>  	ieee80211_rx(dev->wl->hw, skb);
> +	local_bh_enable();

This is a bit awkward from drivers' point of view, we have to add the
same code to all mac80211 drivers using either SPI or SDIO buses.

What about adding a new inline function ieee80211_rx_ni() which would
disable bottom halves like above and call ieee80211_rx()? IMHO that's
easier for the driver developers to understand and also easier to
document ("use this function when calling from process context"). If
this is acceptable, I can create a patch.

-- 
Kalle Valo

  parent reply	other threads:[~2009-10-11 15:59 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-11 10:19 [PATCH] b43: fix ieee80211_rx() context Johannes Berg
2009-10-11 10:26 ` Michael Buesch
2009-10-11 10:31   ` Johannes Berg
2009-10-11 10:35     ` Michael Buesch
2009-10-12  7:27     ` Holger Schurig
2009-10-11 10:39 ` David Miller
2009-10-11 11:53   ` Dave Young
2009-10-11 15:59 ` Kalle Valo [this message]
2009-10-11 16:02   ` Johannes Berg
2009-10-11 16:08     ` Kalle Valo
2009-10-12  3:08       ` David Miller
2009-10-12  7:49         ` Kalle Valo
2009-10-12 12:29           ` Luciano Coelho
2009-10-12 13:38         ` John W. Linville
2009-10-12 20:08           ` David Miller

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