From patchwork Mon Feb 5 19:21:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Korenblit, Miriam Rachel" X-Patchwork-Id: 770331 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (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 5D28459B5C for ; Mon, 5 Feb 2024 19:22:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707160925; cv=none; b=t11WOfwysOjX638L+DawaX1QmdQL3WlCgTnSp4DZW/kHdyd9Ce1vZzIW7raMu2XYPhAfiEFQ+l7O4UYmm0qvbkehwbKdpw0ceYzXrwHEZ94aTSLYH2xqd4eHl8qtpmt3qXE9U2ug1V8D7F/5ux9fedbNQHiheuMvBEYOHjRUnw0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707160925; c=relaxed/simple; bh=ISv1a8OSjIBB4pWfwGywYicE1VRC2Oby2DlJ2858/JU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=k3WBktcxRmF67ghZBC5MlXNU6D7QO2b1IGBo9148nh1jmqYU2PzbtJwuS4MjeJkknQa+ke6Yd/iDfU9UjI8oTLDmjQ3Ca/nAofB0A4FwuiumVzQ7OUayzPwN+YNyPgPNRcQcMQbJfH+56ajPdD+LBF4iJYQFD8JEDUAJaqvCpEI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=AnwgWzXp; arc=none smtp.client-ip=192.198.163.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="AnwgWzXp" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1707160924; x=1738696924; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ISv1a8OSjIBB4pWfwGywYicE1VRC2Oby2DlJ2858/JU=; b=AnwgWzXpfzs7yVqy3gZSnjpuysL51clML9YDIWpQPhhcv3sj0cTGLGsJ ZDjTnHgYT2orKY/A7kJAiUcSDiHvZO9Y+SlbYXuH0yW/wA4TGI4vl020Q zCfvop8kY3WEyt+0Jpoalp8hUFlmbJwKLmvaJ1a8WOBZV6eBbHdEszrAu S2soHaFiayYbURNRUJmNEOku5QEH4ygCUXjHHswezIXiJk0aPQNl1h49J DEOMUK2ycja4NAioKUUp2DSKGpw9r0aY32/8U+4i/geUUrqR7Tuq9xjmt +k0eYlYBeyvCdoZGJ46wA/e/5yKI07oZSASYM6L6dguVIFnxjSqqg01+T w==; X-IronPort-AV: E=McAfee;i="6600,9927,10975"; a="4381648" X-IronPort-AV: E=Sophos;i="6.05,245,1701158400"; d="scan'208";a="4381648" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2024 11:22:03 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,245,1701158400"; d="scan'208";a="5403179" Received: from unknown (HELO WEIS0040.iil.intel.com) ([10.12.217.108]) by fmviesa005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2024 11:22:02 -0800 From: Miri Korenblit To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Johannes Berg Subject: [PATCH 11/15] wifi: iwlwifi: mvm: limit pseudo-D3 to 60 seconds Date: Mon, 5 Feb 2024 21:21:11 +0200 Message-Id: <20240205211151.ca55b3a7fa8d.Id746846f187442ebc689416d2688f2bd9278c0e9@changeid> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240205192115.2320146-1-miriam.rachel.korenblit@intel.com> References: <20240205192115.2320146-1-miriam.rachel.korenblit@intel.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Organization: Intel Israel (74) Limited From: Johannes Berg With unlimited pseudo-D3, we can get stuck here in the read if the firmware never wakes up. All of our testing infrastructure however will anyway give up after at most a minute, so there's no value in that. Limit this to about a minute to avoid getting stuck with the RTNL held forever, which basically makes the machine unusable and then we can't even understand what caused the failure. Signed-off-by: Johannes Berg Signed-off-by: Miri Korenblit --- drivers/net/wireless/intel/iwlwifi/mvm/d3.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c index 994387eac6f7..af449cb9f967 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c @@ -3389,6 +3389,7 @@ static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_mvm *mvm = file->private_data; + unsigned long end = jiffies + 60 * HZ; u32 pme_asserted; while (true) { @@ -3402,6 +3403,12 @@ static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf, if (msleep_interruptible(100)) break; + + if (time_is_before_jiffies(end)) { + IWL_ERR(mvm, + "ending pseudo-D3 with timeout after ~60 seconds\n"); + return -ETIMEDOUT; + } } return 0;