linux-kernel - [PATCH 4.4 07/19] usb-storage: Add compatibility quirk flags for iODD 2531/2541

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Message-Id: <20211110182001.498181764@linuxfoundation.org>
Date:   Wed, 10 Nov 2021 19:43:09 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alan Stern <stern@...land.harvard.edu>,
        James Buren <braewoods+lkml@...ewoods.net>
Subject: [PATCH 4.4 07/19] usb-storage: Add compatibility quirk flags for iODD 2531/2541

From: James Buren <braewoods+lkml@...ewoods.net>

commit 05c8f1b67e67dcd786ae3fe44492bbc617b4bd12 upstream.

These drive enclosures have firmware bugs that make it impossible to mount
a new virtual ISO image after Linux ejects the old one if the device is
locked by Linux. Windows bypasses this problem by the fact that they do
not lock the device. Add a quirk to disable device locking for these
drive enclosures.

Acked-by: Alan Stern <stern@...land.harvard.edu>
Signed-off-by: James Buren <braewoods+lkml@...ewoods.net>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20211014015504.2695089-1-braewoods+lkml@braewoods.net
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/storage/unusual_devs.h |   10 ++++++++++
 1 file changed, 10 insertions(+)

--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -311,6 +311,16 @@ UNUSUAL_DEV(  0x045e, 0xffff, 0x0000, 0x
 		US_FL_MAX_SECTORS_64 ),
 
 /*
+ * Reported by James Buren <braewoods+lkml@...ewoods.net>
+ * Virtual ISOs cannot be remounted if ejected while the device is locked
+ * Disable locking to mimic Windows behavior that bypasses the issue
+ */
+UNUSUAL_DEV(  0x04c5, 0x2028, 0x0001, 0x0001,
+		"iODD",
+		"2531/2541",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_NOT_LOCKABLE),
+
+/*
  * This virtual floppy is found in Sun equipment (x4600, x4200m2, etc.)
  * Reported by Pete Zaitcev <zaitcev@...hat.com>
  * This device chokes on both version of MODE SENSE which we have, so