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 65FF5CCA483 for ; Tue, 7 Jun 2022 18:07:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231426AbiFGSGr (ORCPT ); Tue, 7 Jun 2022 14:06:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351440AbiFGSCD (ORCPT ); Tue, 7 Jun 2022 14:02:03 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2D11152B8C; Tue, 7 Jun 2022 10:44:33 -0700 (PDT) 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 5ED9EB822B8; Tue, 7 Jun 2022 17:44:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4CEEC385A5; Tue, 7 Jun 2022 17:44:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1654623871; bh=FXpiOAXaZbLiKNiDcTOuQElJDUuEn+qZXqf2OSRLOuo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EoSLgle7z1F6Ih3mbDhp8ex8fiw+Vdsf5kFXOa2Z223ijNTErk0BN2Gjkr42bzvau ERra7Cfp+IVqXpaI31O/8gWkQ1hAGh9/a8krUu9HbVueUixWgFwQGeorJWho3x6IBA +MYGk9gAGo0MRf8ub93ieYj2VKDXEaLa9lPYDuwI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.15 121/667] media: cec-adap.c: fix is_configuring state Date: Tue, 7 Jun 2022 18:56:26 +0200 Message-Id: <20220607164938.453287910@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220607164934.766888869@linuxfoundation.org> References: <20220607164934.766888869@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hans Verkuil [ Upstream commit 59267fc34f4900dcd2ec3295f6be04b79aee2186 ] If an adapter is trying to claim a free logical address then it is in the 'is_configuring' state. If during that process the cable is disconnected (HPD goes low, which in turn invalidates the physical address), then cec_adap_unconfigure() is called, and that set the is_configuring boolean to false, even though the thread that's trying to claim an LA is still running. Don't touch the is_configuring bool in cec_adap_unconfigure(), it will eventually be cleared by the thread. By making that change the cec_config_log_addr() function also had to change: it was aborting if is_configuring became false (since that is what cec_adap_unconfigure() did), but that no longer works. Instead check if the physical address is invalid. That is a much more appropriate check anyway. This fixes a bug where the the adapter could be disabled even though the device was still configuring. This could cause POLL transmits to time out. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/cec/core/cec-adap.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c index 1f599e300e42..67776a0d31e8 100644 --- a/drivers/media/cec/core/cec-adap.c +++ b/drivers/media/cec/core/cec-adap.c @@ -1272,7 +1272,7 @@ static int cec_config_log_addr(struct cec_adapter *adap, * While trying to poll the physical address was reset * and the adapter was unconfigured, so bail out. */ - if (!adap->is_configuring) + if (adap->phys_addr == CEC_PHYS_ADDR_INVALID) return -EINTR; if (err) @@ -1329,7 +1329,6 @@ static void cec_adap_unconfigure(struct cec_adapter *adap) adap->phys_addr != CEC_PHYS_ADDR_INVALID) WARN_ON(adap->ops->adap_log_addr(adap, CEC_LOG_ADDR_INVALID)); adap->log_addrs.log_addr_mask = 0; - adap->is_configuring = false; adap->is_configured = false; cec_flush(adap); wake_up_interruptible(&adap->kthread_waitq); @@ -1521,9 +1520,10 @@ static int cec_config_thread_func(void *arg) for (i = 0; i < las->num_log_addrs; i++) las->log_addr[i] = CEC_LOG_ADDR_INVALID; cec_adap_unconfigure(adap); + adap->is_configuring = false; adap->kthread_config = NULL; - mutex_unlock(&adap->lock); complete(&adap->config_completion); + mutex_unlock(&adap->lock); return 0; } -- 2.35.1