From: Eric Nelson <eric.nelson@boundarydevices.com>
Date: Sat, 20 Sep 2014 00:06:46 +0000 (-0700)
Subject: usb: f_mass_storage: set removable flag in do_inquiry based on LUN
X-Git-Tag: submit/tizen/20160318.071304~227
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6afdff07426c24f98403a7288b73e41d495c8c2d;p=profile%2Fcommon%2Fplatform%2Fkernel%2Fu-boot-artik.git

usb: f_mass_storage: set removable flag in do_inquiry based on LUN

Without this flag, tools like Alex Page's USB Image Tool
won't see drives exposed over USB Gadget as removable,
and won't allow access to them.
	http://www.alexpage.de/usb-image-tool/

The code was pulled from the main-line kernel:
	drivers/usb/gadget/function/f_mass_storage.c

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
---

diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 6c8e35fe0..f7223c52d 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -1141,6 +1141,7 @@ static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh)
 
 	memset(buf, 0, 8);
 	buf[0] = TYPE_DISK;
+	buf[1] = curlun->removable ? 0x80 : 0;
 	buf[2] = 2;		/* ANSI SCSI level 2 */
 	buf[3] = 2;		/* SCSI-2 INQUIRY data format */
 	buf[4] = 31;		/* Additional length */