linux-kernel - [PATCH 4.19 35/86] usb: storage: Add quirk for Samsung Fit flash

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Date:   Tue, 10 Mar 2020 13:44:59 +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, Jim Lin <jilin@...dia.com>,
        Alan Stern <stern@...land.harvard.edu>
Subject: [PATCH 4.19 35/86] usb: storage: Add quirk for Samsung Fit flash

From: Jim Lin <jilin@...dia.com>

commit 86d92f5465958752481269348d474414dccb1552 upstream.

Current driver has 240 (USB2.0) and 2048 (USB3.0) as max_sectors,
e.g., /sys/bus/scsi/devices/0:0:0:0/max_sectors

If data access times out, driver error handling will issue a port
reset.
Sometimes Samsung Fit (090C:1000) flash disk will not respond to
later Set Address or Get Descriptor command.

Adding this quirk to limit max_sectors to 64 sectors to avoid issue
occurring.

Signed-off-by: Jim Lin <jilin@...dia.com>
Acked-by: Alan Stern <stern@...land.harvard.edu>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/1583158895-31342-1-git-send-email-jilin@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/storage/unusual_devs.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -1258,6 +1258,12 @@ UNUSUAL_DEV( 0x090a, 0x1200, 0x0000, 0x9
 		USB_SC_RBC, USB_PR_BULK, NULL,
 		0 ),
 
+UNUSUAL_DEV(0x090c, 0x1000, 0x1100, 0x1100,
+		"Samsung",
+		"Flash Drive FIT",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_MAX_SECTORS_64),
+
 /* aeb */
 UNUSUAL_DEV( 0x090c, 0x1132, 0x0000, 0xffff,
 		"Feiya",