netdev - Re: RTL8192EE PCIe Wireless Network Adapter crashed with linux-4.13

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Message-ID: <871sn09kdt.fsf@kamboji.qca.qualcomm.com>
Date:   Thu, 21 Sep 2017 17:49:50 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Larry Finger <Larry.Finger@...inger.net>
Cc:     Zwindl <zwindl@...tonmail.com>,
        "linux-wireless\@vger.kernel.org" <linux-wireless@...r.kernel.org>,
        "chaoming_li\@realsil.com.cn" <chaoming_li@...lsil.com.cn>,
        "pkshih\@realtek.com" <pkshih@...ltek.com>,
        "johannes.berg\@intel.com" <johannes.berg@...el.com>,
        "gregkh\@linuxfoundation.org" <gregkh@...uxfoundation.org>,
        "netdev\@vger.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: RTL8192EE PCIe Wireless Network Adapter crashed with linux-4.13

Larry Finger <Larry.Finger@...inger.net> writes:

> On 09/21/2017 06:37 AM, Zwindl wrote:
>> Hi, I've reported to archlinux's bugzilla, and finally found out the
>> flag which caused that issue, it's the
>> `CONFIG_INTEL_IOMMU_DEFAULT_ON=y` flag, I think may this is a kernel
>> bug, more details at https://bugs.archlinux.org/task/55665
>
> My standard kernel has the following:
>
> CONFIG_INTEL_IOMMU=y
> # CONFIG_INTEL_IOMMU_SVM is not set
> # CONFIG_INTEL_IOMMU_DEFAULT_ON is not set
>
> I will do some further testing to see if turning
> CONFIG_INTEL_IOMMU_DEFAULT_ON also breaks my system.

But not all systems have iommu so check from dmesg that iommu is really
enabled.

-- 
Kalle Valo