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From: James Buren <braewoods+lkml@braewoods.net>
To: linux-usb@vger.kernel.org
Cc: James Buren <braewoods+lkml@braewoods.net>
Subject: [PATCH] usb-storage: Add compatibility quirk flags for iODD 2531/2541
Date: Wed, 13 Oct 2021 20:55:04 -0500	[thread overview]
Message-ID: <20211014015504.2695089-1-braewoods+lkml@braewoods.net> (raw)

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.

Signed-off-by: James Buren <braewoods+lkml@braewoods.net>
---
 drivers/usb/storage/unusual_devs.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index c6b3fcf90180..29191d33c0e3 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -406,6 +406,16 @@ UNUSUAL_DEV(  0x04b8, 0x0602, 0x0110, 0x0110,
 		"785EPX Storage",
 		USB_SC_SCSI, USB_PR_BULK, NULL, US_FL_SINGLE_LUN),
 
+/*
+ * Reported by James Buren <braewoods+lkml@braewoods.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),
+
 /*
  * Not sure who reported this originally but
  * Pavel Machek <pavel@ucw.cz> reported that the extra US_FL_SINGLE_LUN
-- 
2.25.1


             reply	other threads:[~2021-10-14  2:03 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-14  1:55 James Buren [this message]
2021-10-14  2:20 ` Alan Stern
2021-10-15  6:29   ` braewoods
2021-10-15  7:54     ` Greg KH
2021-10-15 13:38       ` Alan Stern
  -- strict thread matches above, loose matches on Subject: below --
2021-10-14  1:50 James Buren
2021-10-14  2:01 ` braewoods

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