From patchwork Fri Feb 9 18:51:00 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 10209805 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1BCEB60236 for ; Fri, 9 Feb 2018 18:51:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0A2112950E for ; Fri, 9 Feb 2018 18:51:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F29E82989B; Fri, 9 Feb 2018 18:51:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 289272950E for ; Fri, 9 Feb 2018 18:51:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752059AbeBISvG (ORCPT ); Fri, 9 Feb 2018 13:51:06 -0500 Received: from nbd.name ([46.4.11.11]:41948 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751004AbeBISvF (ORCPT ); Fri, 9 Feb 2018 13:51:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=G2b0F19bb6RFsUhhTOs9Ks6UxGBsTM40FrP/ZE60ih8=; b=jgCQCPW/IlAJDsVz+cArmJT8WQ uAVTjR4pqTBitcuVkymTvrrOyg/RVcY1m0WNpT0fISENme/deMCL44bT/NTeeHsMwnXFGIncgObDi 0WE/2rnIZQJGMjHO538XTQeYb7TQKfeROxY1TQ2ml83Mp9YvIVYfb/NraQd8Z9TdAjkM=; Received: by maeck.local (Postfix, from userid 501) id C7A2B118963C; Fri, 9 Feb 2018 19:51:00 +0100 (CET) From: Felix Fietkau To: linux-wireless@vger.kernel.org Cc: johannes@sipsolutions.net Subject: [PATCH] mac80211: round IEEE80211_TX_STATUS_HEADROOM up to multiple of 4 Date: Fri, 9 Feb 2018 19:51:00 +0100 Message-Id: <20180209185100.22511-1-nbd@nbd.name> X-Mailer: git-send-email 2.14.2 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This ensures that mac80211 allocated management frames are properly aligned, which makes copying them more efficient. For instance, mt76 uses iowrite32_copy to copy beacon frames to beacon template memory on the chip. Misaligned 32-bit accesses cause CPU exceptions on MIPS and should be avoided. Signed-off-by: Felix Fietkau --- include/net/mac80211.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 906e90223066..d999b8c8a44b 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -4149,7 +4149,7 @@ void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *sta, u8 tid); * The TX headroom reserved by mac80211 for its own tx_status functions. * This is enough for the radiotap header. */ -#define IEEE80211_TX_STATUS_HEADROOM 14 +#define IEEE80211_TX_STATUS_HEADROOM 16 /** * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames