[PATCH] usb: gadget: f_mass_storage: Make CD-ROM emulation works with Windows OS

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From: Neal Liu <neal_liu@aspeedtech.com>
Date: 2022-06-23 02:41:39
Subsystem: the rest, usb gadget/peripheral subsystem, usb subsystem · Maintainers: Linus Torvalds, Neill Kapron, Greg Kroah-Hartman

Add read TOC with format 2 to support CD-ROM emulation with
Windows OS.
This patch is tested on Windows OS Server 2019.

Signed-off-by: Neal Liu <neal_liu@aspeedtech.com>
---
 drivers/usb/gadget/function/f_mass_storage.c | 1 +
 1 file changed, 1 insertion(+)
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index 3a77bca0ebe1..3c2a5f1e8b66 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -1209,6 +1209,7 @@ static int do_read_toc(struct fsg_common *common, struct fsg_buffhd *bh)
 
 	switch (format) {
 	case 0:
+	case 1:
 		/* Formatted TOC */
 		len = 4 + 2*8;		/* 4 byte header + 2 descriptors */
 		memset(buf, 0, len);
-- 
2.25.1
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