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From: Alan Stern <stern@rowland.harvard.edu>
To: Zebediah Figura <zfigura@codeweavers.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
	usb-storage@lists.one-eyed-alien.net, linux-usb@vger.kernel.org
Subject: Re: Bug 207877: ASMedia drive (174c:55aa) hangs in ioctl CDROM_DRIVE_STATUS when mounting a DVD
Date: Thu, 28 May 2020 13:05:09 -0400	[thread overview]
Message-ID: <20200528170509.GC14188@rowland.harvard.edu> (raw)
In-Reply-To: <232b68f8-9a5c-89fd-2e12-bf63f49dbe38@codeweavers.com>

> Thanks, I've attached a usbmon trace to the bug. It seems the kernel submits
> a bulk input transfer that never receives a response. I hope my drive isn't
> broken...

Did you wait for thirty seconds after that final bulk input transfer 
started?  It should have been aborted at that point, just like the two 
previous transfer attempts.  There might be a bad sector on the disc you 
were trying to read; all three attempts seem to have failed at the same 
place.

I get the impression that the SCSI error handler may have tried to reset 
the device without first aborting the current transfer.  But it's not 
easy to tell if that's what really happened.  You might be able to get 
more information by enabling CONFIG_USB_STORAGE_DEBUG and rebuilding the 
usb-storage driver, or by turning on SCSI debugging.

Alan Stern

  reply	other threads:[~2020-05-28 17:05 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-28  4:23 Bug 207877: ASMedia drive (174c:55aa) hangs in ioctl CDROM_DRIVE_STATUS when mounting a DVD Zebediah Figura
2020-05-28  7:54 ` Greg KH
2020-05-28 15:02   ` Zebediah Figura
2020-05-28 16:04     ` Alan Stern
2020-05-28 16:21       ` Zebediah Figura
2020-05-28 17:05         ` Alan Stern [this message]
2020-05-28 19:27           ` Zebediah Figura
2020-05-30  1:03             ` Alan Stern

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