linux-kernel - [PATCH 4/6] fms: Support the DVD/BD images size over 2.1Gb

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Date:   Sun, 27 Jun 2021 00:18:17 +0300
From:   Igor Kononenko <i.kononenko@...ro.com>
To:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     <openbmc@...ts.ozlabs.org>, Igor Kononenko <i.kononenko@...ro.com>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/6] fms: Support the DVD/BD images size over 2.1Gb

Adds the ability to use the FMS image size greater than 2.1Gb.  This
limitation is due to the maximum number of available frames on the
CD-ROM media.

An incoming implementation of additional media formats (DVD-ROM, BD-ROM)
should support both formats' possible capacity.

End-user-impact: Now, the FMS able to use a medium-image backend  file,
                 which size is more significant than 2.1Gb

Signed-off-by: Igor Kononenko <i.kononenko@...ro.com>
---
 drivers/usb/gadget/function/storage_common.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/usb/gadget/function/storage_common.c b/drivers/usb/gadget/function/storage_common.c
index b883b8b7b05b..468f7622b11d 100644
--- a/drivers/usb/gadget/function/storage_common.c
+++ b/drivers/usb/gadget/function/storage_common.c
@@ -242,15 +242,8 @@ int fsg_lun_open(struct fsg_lun *curlun, const char *filename)
 
 	num_sectors = size >> blkbits; /* File size in logic-block-size blocks */
 	min_sectors = 1;
-	if (curlun->cdrom) {
+	if (curlun->cdrom)
 		min_sectors = 300;	/* Smallest track is 300 frames */
-		if (num_sectors >= 256*60*75) {
-			num_sectors = 256*60*75 - 1;
-			LINFO(curlun, "file too big: %s\n", filename);
-			LINFO(curlun, "using only first %d blocks\n",
-					(int) num_sectors);
-		}
-	}
 	if (num_sectors < min_sectors) {
 		LINFO(curlun, "file too small: %s\n", filename);
 		rc = -ETOOSMALL;
-- 
2.32.0