From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 46C64C433F5 for ; Tue, 18 Jan 2022 02:40:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=UWc2kFokUreOG1M0nmAYql6RH9RKa0ql0nwGOHZ1zLs=; b=yx+4+0IaF2/Ikv wCHEckDE/UnCmJgU82Uh2ipo3TorCSc9AJA2nOCM9r8U8pUrcmHIJCksOS8fQ8Qbw7SLJDf7UUP/M 7x9bMUs+sGe+T8L8orAZ8MudUdMtS+N1yWV2Dkthx6pYS52OiHbdN1ZJQpg90o4zJV+5fccD77U2B YhhffuMdLpWYH2n1HKWfdiaPFsuTmWULPphdDnEmqxEbZfVnwBmzI4KZnAGIz4RKUNOiXWs/yIlrd 8All29SpAqKJE7TTxI59djTln07sIddLptZvcSE+0EFRFt9CDPmnP/GSBBXQ3LP8AtMiVPks385B5 PvqLVV8vNoA/5s/68jpw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n9eQN-00H3Dz-J6; Tue, 18 Jan 2022 02:40:43 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n9eFF-00GxEQ-2Z for ath11k@lists.infradead.org; Tue, 18 Jan 2022 02:29:15 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id C0C4FB81244; Tue, 18 Jan 2022 02:29:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 566EBC36AF3; Tue, 18 Jan 2022 02:29:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642472950; bh=X1Ks8FvRuAMpRB/m8dyQVbxEYAjsGrrkW6v02oHlFys=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UiCbOvrvEGOo6binK/73+Tm1KJIRrHYjB1/vt5zTmCbgQArBZlSpoAPa+UifEOt2J G2fQFeqwsl4yBXdWxarQDzR0nVitFLFjcGuy3lFWKUfsQSn978N7gzQCqmqs31zR+w 1heiRxxrRhk5XaSBnayYCagNTChvdvr8wbHMdc0mJ/0M6ybdZUmEN76sWyTS1BZ3Oz 2xPc+f21At697R1dWh7PmTXy/NFIQSb8r4Z7+SIHZ4VvHWF/IrJ6PDejTqWTTrJHbm pqcnJ8BzAFLtXhd6zu4Naypf4Ca0Y0LkuRkredlusDTgVQTMsgkXBS0hT6EONYYPdq I/49PInSpOizQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ben Greear , Kalle Valo , Sasha Levin , kvalo@kernel.org, davem@davemloft.net, kuba@kernel.org, ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.16 172/217] ath11k: Fix napi related hang Date: Mon, 17 Jan 2022 21:18:55 -0500 Message-Id: <20220118021940.1942199-172-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220118021940.1942199-1-sashal@kernel.org> References: <20220118021940.1942199-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220117_182913_438108_8D4AAAC1 X-CRM114-Status: GOOD ( 14.60 ) X-BeenThere: ath11k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath11k" Errors-To: ath11k-bounces+ath11k=archiver.kernel.org@lists.infradead.org From: Ben Greear [ Upstream commit d943fdad7589653065be0e20aadc6dff37725ed4 ] Similar to the same bug in ath10k, a napi disable w/out it being enabled will hang forever. I believe I saw this while trying rmmod after driver had some failure on startup. Fix it by keeping state on whether napi is enabled or not. And, remove un-used napi pointer in ath11k driver base struct. Signed-off-by: Ben Greear Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200903195254.29379-1-greearb@candelatech.com Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath11k/ahb.c | 12 +++++++++--- drivers/net/wireless/ath/ath11k/core.h | 2 +- drivers/net/wireless/ath/ath11k/pci.c | 12 +++++++++--- 3 files changed, 19 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c index 8c9c781afc3e5..b9939057b7baf 100644 --- a/drivers/net/wireless/ath/ath11k/ahb.c +++ b/drivers/net/wireless/ath/ath11k/ahb.c @@ -175,8 +175,11 @@ static void __ath11k_ahb_ext_irq_disable(struct ath11k_base *ab) ath11k_ahb_ext_grp_disable(irq_grp); - napi_synchronize(&irq_grp->napi); - napi_disable(&irq_grp->napi); + if (irq_grp->napi_enabled) { + napi_synchronize(&irq_grp->napi); + napi_disable(&irq_grp->napi); + irq_grp->napi_enabled = false; + } } } @@ -300,7 +303,10 @@ static void ath11k_ahb_ext_irq_enable(struct ath11k_base *ab) for (i = 0; i < ATH11K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath11k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; - napi_enable(&irq_grp->napi); + if (!irq_grp->napi_enabled) { + napi_enable(&irq_grp->napi); + irq_grp->napi_enabled = true; + } ath11k_ahb_ext_grp_enable(irq_grp); } } diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h index 31d234a51c79b..62ceee363fea0 100644 --- a/drivers/net/wireless/ath/ath11k/core.h +++ b/drivers/net/wireless/ath/ath11k/core.h @@ -136,6 +136,7 @@ struct ath11k_ext_irq_grp { u32 num_irq; u32 grp_id; u64 timestamp; + bool napi_enabled; struct napi_struct napi; struct net_device napi_ndev; }; @@ -713,7 +714,6 @@ struct ath11k_base { u32 wlan_init_status; int irq_num[ATH11K_IRQ_NUM_MAX]; struct ath11k_ext_irq_grp ext_irq_grp[ATH11K_EXT_IRQ_GRP_NUM_MAX]; - struct napi_struct *napi; struct ath11k_targ_cap target_caps; u32 ext_service_bitmap[WMI_SERVICE_EXT_BM_SIZE]; bool pdevs_macaddr_valid; diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index 3d353e7c9d5c2..5a78a7cb65f5e 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -634,8 +634,11 @@ static void __ath11k_pci_ext_irq_disable(struct ath11k_base *sc) ath11k_pci_ext_grp_disable(irq_grp); - napi_synchronize(&irq_grp->napi); - napi_disable(&irq_grp->napi); + if (irq_grp->napi_enabled) { + napi_synchronize(&irq_grp->napi); + napi_disable(&irq_grp->napi); + irq_grp->napi_enabled = false; + } } } @@ -654,7 +657,10 @@ static void ath11k_pci_ext_irq_enable(struct ath11k_base *ab) for (i = 0; i < ATH11K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath11k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; - napi_enable(&irq_grp->napi); + if (!irq_grp->napi_enabled) { + napi_enable(&irq_grp->napi); + irq_grp->napi_enabled = true; + } ath11k_pci_ext_grp_enable(irq_grp); } } -- 2.34.1 -- ath11k mailing list ath11k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath11k From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2202C433FE for ; Tue, 18 Jan 2022 02:48:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345558AbiARCsh (ORCPT ); Mon, 17 Jan 2022 21:48:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58666 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345433AbiARCbc (ORCPT ); Mon, 17 Jan 2022 21:31:32 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA08CC0617A3; Mon, 17 Jan 2022 18:29:12 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A478DB8123A; Tue, 18 Jan 2022 02:29:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 566EBC36AF3; Tue, 18 Jan 2022 02:29:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642472950; bh=X1Ks8FvRuAMpRB/m8dyQVbxEYAjsGrrkW6v02oHlFys=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UiCbOvrvEGOo6binK/73+Tm1KJIRrHYjB1/vt5zTmCbgQArBZlSpoAPa+UifEOt2J G2fQFeqwsl4yBXdWxarQDzR0nVitFLFjcGuy3lFWKUfsQSn978N7gzQCqmqs31zR+w 1heiRxxrRhk5XaSBnayYCagNTChvdvr8wbHMdc0mJ/0M6ybdZUmEN76sWyTS1BZ3Oz 2xPc+f21At697R1dWh7PmTXy/NFIQSb8r4Z7+SIHZ4VvHWF/IrJ6PDejTqWTTrJHbm pqcnJ8BzAFLtXhd6zu4Naypf4Ca0Y0LkuRkredlusDTgVQTMsgkXBS0hT6EONYYPdq I/49PInSpOizQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ben Greear , Kalle Valo , Sasha Levin , kvalo@kernel.org, davem@davemloft.net, kuba@kernel.org, ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.16 172/217] ath11k: Fix napi related hang Date: Mon, 17 Jan 2022 21:18:55 -0500 Message-Id: <20220118021940.1942199-172-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220118021940.1942199-1-sashal@kernel.org> References: <20220118021940.1942199-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Ben Greear [ Upstream commit d943fdad7589653065be0e20aadc6dff37725ed4 ] Similar to the same bug in ath10k, a napi disable w/out it being enabled will hang forever. I believe I saw this while trying rmmod after driver had some failure on startup. Fix it by keeping state on whether napi is enabled or not. And, remove un-used napi pointer in ath11k driver base struct. Signed-off-by: Ben Greear Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200903195254.29379-1-greearb@candelatech.com Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath11k/ahb.c | 12 +++++++++--- drivers/net/wireless/ath/ath11k/core.h | 2 +- drivers/net/wireless/ath/ath11k/pci.c | 12 +++++++++--- 3 files changed, 19 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c index 8c9c781afc3e5..b9939057b7baf 100644 --- a/drivers/net/wireless/ath/ath11k/ahb.c +++ b/drivers/net/wireless/ath/ath11k/ahb.c @@ -175,8 +175,11 @@ static void __ath11k_ahb_ext_irq_disable(struct ath11k_base *ab) ath11k_ahb_ext_grp_disable(irq_grp); - napi_synchronize(&irq_grp->napi); - napi_disable(&irq_grp->napi); + if (irq_grp->napi_enabled) { + napi_synchronize(&irq_grp->napi); + napi_disable(&irq_grp->napi); + irq_grp->napi_enabled = false; + } } } @@ -300,7 +303,10 @@ static void ath11k_ahb_ext_irq_enable(struct ath11k_base *ab) for (i = 0; i < ATH11K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath11k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; - napi_enable(&irq_grp->napi); + if (!irq_grp->napi_enabled) { + napi_enable(&irq_grp->napi); + irq_grp->napi_enabled = true; + } ath11k_ahb_ext_grp_enable(irq_grp); } } diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h index 31d234a51c79b..62ceee363fea0 100644 --- a/drivers/net/wireless/ath/ath11k/core.h +++ b/drivers/net/wireless/ath/ath11k/core.h @@ -136,6 +136,7 @@ struct ath11k_ext_irq_grp { u32 num_irq; u32 grp_id; u64 timestamp; + bool napi_enabled; struct napi_struct napi; struct net_device napi_ndev; }; @@ -713,7 +714,6 @@ struct ath11k_base { u32 wlan_init_status; int irq_num[ATH11K_IRQ_NUM_MAX]; struct ath11k_ext_irq_grp ext_irq_grp[ATH11K_EXT_IRQ_GRP_NUM_MAX]; - struct napi_struct *napi; struct ath11k_targ_cap target_caps; u32 ext_service_bitmap[WMI_SERVICE_EXT_BM_SIZE]; bool pdevs_macaddr_valid; diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index 3d353e7c9d5c2..5a78a7cb65f5e 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -634,8 +634,11 @@ static void __ath11k_pci_ext_irq_disable(struct ath11k_base *sc) ath11k_pci_ext_grp_disable(irq_grp); - napi_synchronize(&irq_grp->napi); - napi_disable(&irq_grp->napi); + if (irq_grp->napi_enabled) { + napi_synchronize(&irq_grp->napi); + napi_disable(&irq_grp->napi); + irq_grp->napi_enabled = false; + } } } @@ -654,7 +657,10 @@ static void ath11k_pci_ext_irq_enable(struct ath11k_base *ab) for (i = 0; i < ATH11K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath11k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; - napi_enable(&irq_grp->napi); + if (!irq_grp->napi_enabled) { + napi_enable(&irq_grp->napi); + irq_grp->napi_enabled = true; + } ath11k_pci_ext_grp_enable(irq_grp); } } -- 2.34.1