netdev - [PATCH 42/65] staging: wfx: do not update uapsd if not necessary

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20200115121041.10863-43-Jerome.Pouiller@silabs.com>
Date:   Wed, 15 Jan 2020 12:13:04 +0000
From:   Jérôme Pouiller <Jerome.Pouiller@...abs.com>
To:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller <Jerome.Pouiller@...abs.com>
Subject: [PATCH 42/65] staging: wfx: do not update uapsd if not necessary

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

wfx_conf_tx() is called for each queue. On every call, the function
updates UAPSD mask and PM mode for all queues. It is a pity since the
UAPSD configuration very rarely changes and it makes exchanges between
the host and the chip more difficult to track.

This patch avoid to update UAPSD and Power Mode in most usual cases.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/sta.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index bf285389c303..6a43decd5ae6 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -286,6 +286,7 @@ int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 {
 	struct wfx_dev *wdev = hw->priv;
 	struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
+	int old_uapsd = wvif->uapsd_mask;
 	int ret = 0;
 
 	WARN_ON(queue >= hw->queues);
@@ -294,7 +295,8 @@ int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 	assign_bit(queue, &wvif->uapsd_mask, params->uapsd);
 	memcpy(&wvif->edca_params[queue], params, sizeof(*params));
 	hif_set_edca_queue_params(wvif, queue, params);
-	if (wvif->vif->type == NL80211_IFTYPE_STATION) {
+	if (wvif->vif->type == NL80211_IFTYPE_STATION &&
+	    old_uapsd != wvif->uapsd_mask) {
 		hif_set_uapsd_info(wvif, wvif->uapsd_mask);
 		wfx_update_pm(wvif);
 	}
-- 
2.25.0