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From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: Aaron Ma <aaron.ma@canonical.com>,
	mathias.nyman@intel.com, gregkh@linuxfoundation.org,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] usb: xhci: fix uninitialized completion when USB3 port got wrong status
Date: Tue, 23 Oct 2018 13:42:39 +0300	[thread overview]
Message-ID: <f0bc503c-f128-d427-37ce-8b609319dc13@linux.intel.com> (raw)
In-Reply-To: <1540230167-12528-1-git-send-email-aaron.ma@canonical.com>

On 22.10.2018 20:42, Aaron Ma wrote:
> Realtek USB3.0 Card Reader [0bda:0328] reports wrong port status on
> Cannon lake PCH USB3.1 xHCI [8086:a36d] after resume from S3,
> after clear port reset it works fine.
> 
> Since this device is registered on USB3 roothub at boot,
> when port status reports not superspeed, xhci_get_port_status will call
> an uninitialized completion in bus_state[0].
> Kernel will hang because of NULL pointer.
> 
> Restrict the USB2 resume status check in USB2 roothub to fix hang issue.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Aaron Ma <aaron.ma@canonical.com>

Thanks, adding to queue, will send forward after rc1

-Mathias

      parent reply	other threads:[~2018-10-23 10:39 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-22 17:42 Aaron Ma
2018-10-22 17:42 ` [PATCH v2 2/2] usb: xhci: fix timeout for transition from RExit to U0 Aaron Ma
2018-10-23 10:43   ` Mathias Nyman
2018-10-23 10:42 ` Mathias Nyman [this message]

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