From a5a8eb1fe7448a621400c2c2e748b0a7b3736f43 Mon Sep 17 00:00:00 2001 From: =?utf8?q?J=C3=A9r=C3=B4me=20Pouiller?= Date: Mon, 13 Sep 2021 15:01:34 +0200 Subject: [PATCH] staging: wfx: ignore PS when STA/AP share same channel MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit When multiple interface are in use. One is always AP while the other is always station. When the two interface use the same channel, it makes no sense to enabled Power Saving (PS) on the station. Indeed, because of the AP, the device will be kept awake on this channel anyway. In add, when multiple interface are in use, mac80211 does not update the PS information and delegate to the driver responsibility to do the right thing. Thus, in the current code, when the user enable PS in this configuration, the driver finally enable PS-Poll which is probably not what the user expected. This patch detect this case and applies a sane configuration in all cases. Signed-off-by: Jérôme Pouiller Link: https://lore.kernel.org/r/20210913130203.1903622-4-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wfx/sta.c | 32 ++++++++++++++++++++------------ 1 file changed, 20 insertions(+), 12 deletions(-) diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c index 5de9ccf..aff0559 100644 --- a/drivers/staging/wfx/sta.c +++ b/drivers/staging/wfx/sta.c @@ -154,18 +154,26 @@ static int wfx_get_ps_timeout(struct wfx_vif *wvif, bool *enable_ps) chan0 = wdev_to_wvif(wvif->wdev, 0)->vif->bss_conf.chandef.chan; if (wdev_to_wvif(wvif->wdev, 1)) chan1 = wdev_to_wvif(wvif->wdev, 1)->vif->bss_conf.chandef.chan; - if (chan0 && chan1 && chan0->hw_value != chan1->hw_value && - wvif->vif->type != NL80211_IFTYPE_AP) { - // It is necessary to enable powersave if channels - // are different. - if (enable_ps) - *enable_ps = true; - if (wvif->wdev->force_ps_timeout > -1) - return wvif->wdev->force_ps_timeout; - else if (wfx_api_older_than(wvif->wdev, 3, 2)) - return 0; - else - return 30; + if (chan0 && chan1 && wvif->vif->type != NL80211_IFTYPE_AP) { + if (chan0->hw_value == chan1->hw_value) { + // It is useless to enable PS if channels are the same. + if (enable_ps) + *enable_ps = false; + if (wvif->vif->bss_conf.assoc && wvif->vif->bss_conf.ps) + dev_info(wvif->wdev->dev, "ignoring requested PS mode"); + return -1; + } else { + // It is necessary to enable PS if channels + // are different. + if (enable_ps) + *enable_ps = true; + if (wvif->wdev->force_ps_timeout > -1) + return wvif->wdev->force_ps_timeout; + else if (wfx_api_older_than(wvif->wdev, 3, 2)) + return 0; + else + return 30; + } } if (enable_ps) *enable_ps = wvif->vif->bss_conf.ps; -- 2.7.4