From patchwork Mon Jan 22 11:57:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Antipov X-Patchwork-Id: 13525348 X-Patchwork-Delegate: kvalo@adurom.com Received: from forward102b.mail.yandex.net (forward102b.mail.yandex.net [178.154.239.149]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AA1183A8F5 for ; Mon, 22 Jan 2024 11:59:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.154.239.149 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705924751; cv=none; b=HNJIQaGsxUE+UrqmCRLcw/Jarttit9ARbM8RMOw3aga/jhyimuZDhq2cTfERG9q6udmBVaxEFXdyugRVml/pLQdjOdKKEw5g7QOZxQDzy2fYVK4XfcgbEJ9vyGMIdKZa5SNPbyE7dY6RZT7/MTSSO+DHUWtpPlIZ/5zYHozV38U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705924751; c=relaxed/simple; bh=otPeA/GCwhNW6ZNFeugpra1/LWH0JekN+gek8heo7Kk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=X3HmNM9d/uX8QfHwU89g8qZ6kYVtlOZCsZsvSzeB0EpWkHInihi+BULtWNA252RZsZmpBLjb0w3u55LA7ezQcg9D8Tq0nj+/S4VoROvgWxtsc8AxjQrFD3ZqffsguOdSggnYpTbzHG9uChYf32WxZfjatu43diiqGsLNKLYWz5A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex.ru; spf=pass smtp.mailfrom=yandex.ru; dkim=pass (1024-bit key) header.d=yandex.ru header.i=@yandex.ru header.b=FGEijjOx; arc=none smtp.client-ip=178.154.239.149 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=yandex.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=yandex.ru header.i=@yandex.ru header.b="FGEijjOx" Received: from mail-nwsmtp-smtp-production-main-25.sas.yp-c.yandex.net (mail-nwsmtp-smtp-production-main-25.sas.yp-c.yandex.net [IPv6:2a02:6b8:c08:2e14:0:640:2cd1:0]) by forward102b.mail.yandex.net (Yandex) with ESMTPS id 654936098A; Mon, 22 Jan 2024 14:58:59 +0300 (MSK) Received: by mail-nwsmtp-smtp-production-main-25.sas.yp-c.yandex.net (smtp/Yandex) with ESMTPSA id wwPajqcAWKo0-okYju9jh; Mon, 22 Jan 2024 14:58:58 +0300 X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1705924738; bh=Ovcz7Fw3FNU/m4f1SdnjVR2d3gKU2wh9K/KWXos5QK8=; h=In-Reply-To:Cc:References:To:Message-ID:Date:Subject:From; b=FGEijjOx8tsxVaeYdbTB8+uyvBCZRevxpfvPppCTm56z1kOLvc+vQLwV/WOujpK/y isKPJP3wzUotO6Lijd3my9I5PFxnA5uqoSSZO8SxpBNHXS+WftsuFQWY62Cl2EQMRm /M9/gTl4in1IXztwWasGV2Its5VGfCR2oflH/ZGg= Authentication-Results: mail-nwsmtp-smtp-production-main-25.sas.yp-c.yandex.net; dkim=pass header.i=@yandex.ru From: Dmitry Antipov To: Arend van Spriel Cc: Bjorn Helgaas , Kalle Valo , linux-wireless@vger.kernel.org, lvc-project@linuxtesting.org, Dmitry Antipov Subject: [PATCH 1/2] [v3] wifi: brcmfmac: handle possible completion timeouts Date: Mon, 22 Jan 2024 14:57:24 +0300 Message-ID: <20240122115749.67682-1-dmantipov@yandex.ru> X-Mailer: git-send-email 2.43.0 In-Reply-To: <4cc44b07-13bd-49d0-b10f-b88875380f8c@broadcom.com> References: <4cc44b07-13bd-49d0-b10f-b88875380f8c@broadcom.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Handle possible 'wait_for_completion_timeout()' errors in 'brcmf_p2p_af_searching_channel()' and 'brcmf_p2p_del_vif()', fix spelling and add comments where appropriate. Compile tested only. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Dmitry Antipov --- v3: adjust per Arend's review v2: rebase against wireless-next tree --- .../broadcom/brcm80211/brcmfmac/p2p.c | 36 +++++++++++-------- 1 file changed, 22 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c index 6e0c90f4718b..a346c5a6e602 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c @@ -1151,6 +1151,7 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) { struct afx_hdl *afx_hdl = &p2p->afx_hdl; struct brcmf_cfg80211_vif *pri_vif; + bool timeout = false; s32 retry; brcmf_dbg(TRACE, "Enter\n"); @@ -1173,8 +1174,10 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) retry); /* search peer on peer's listen channel */ schedule_work(&afx_hdl->afx_work); - wait_for_completion_timeout(&afx_hdl->act_frm_scan, - P2P_AF_FRM_SCAN_MAX_WAIT); + timeout = !wait_for_completion_timeout + (&afx_hdl->act_frm_scan, P2P_AF_FRM_SCAN_MAX_WAIT); + if (timeout) + break; if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))) @@ -1186,8 +1189,11 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) /* listen on my listen channel */ afx_hdl->is_listen = true; schedule_work(&afx_hdl->afx_work); - wait_for_completion_timeout(&afx_hdl->act_frm_scan, - P2P_AF_FRM_SCAN_MAX_WAIT); + timeout = !wait_for_completion_timeout + (&afx_hdl->act_frm_scan, + P2P_AF_FRM_SCAN_MAX_WAIT); + if (timeout) + break; } if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, @@ -1209,7 +1215,7 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); - return afx_hdl->peer_chan; + return timeout ? P2P_INVALID_CHANNEL : afx_hdl->peer_chan; } @@ -1580,10 +1586,11 @@ static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, (p2p->wait_for_offchan_complete) ? "off-channel" : "on-channel"); + /* timeout would cause the code to proceed in the else branch below */ wait_for_completion_timeout(&p2p->send_af_done, P2P_AF_MAX_WAIT_TIME); if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { - brcmf_dbg(TRACE, "TX action frame operation is success\n"); + brcmf_dbg(TRACE, "TX action frame operation has succeeded\n"); } else { err = -EIO; brcmf_dbg(TRACE, "TX action frame operation has failed\n"); @@ -2371,7 +2378,7 @@ int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) struct brcmf_cfg80211_vif *vif; enum nl80211_iftype iftype; bool wait_for_disable = false; - int err; + int err = 0; brcmf_dbg(TRACE, "delete P2P vif\n"); vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); @@ -2403,14 +2410,15 @@ int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); - if (wait_for_disable) - wait_for_completion_timeout(&cfg->vif_disabled, - BRCMF_P2P_DISABLE_TIMEOUT); - - err = 0; if (iftype != NL80211_IFTYPE_P2P_DEVICE) { - brcmf_vif_clear_mgmt_ies(vif); - err = brcmf_p2p_release_p2p_if(vif); + if (wait_for_disable) + err = (wait_for_completion_timeout + (&cfg->vif_disabled, + BRCMF_P2P_DISABLE_TIMEOUT) ? 0 : -ETIMEDOUT); + if (!err) { + brcmf_vif_clear_mgmt_ies(vif); + err = brcmf_p2p_release_p2p_if(vif); + } } if (!err) { /* wait for firmware event */