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From:   Neal Liu <neal_liu@aspeedtech.com>
To:     Felipe Balbi <balbi@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Alan Stern <stern@rowland.harvard.edu>
CC:     Roger Quadros <roger.quadros@nokia.com>,
        Miaohe Lin <linmiaohe@huawei.com>,
        Wesley Cheng <quic_wcheng@quicinc.com>,
        "Eric W . Biederman" <ebiederm@xmission.com>,
        Matthew Wilcox <willy@infradead.org>,
        Nikita Yushchenko <nikita.yoush@cogentembedded.com>,
        Cai Huoqing <cai.huoqing@linux.dev>,
        <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <BMC-SW@aspeedtech.com>
Subject: [PATCH RESEND] usb: gadget: f_mass_storage: Make CD-ROM emulation works with Windows OS
Date:   Thu, 23 Jun 2022 11:04:05 +0800
Message-ID: <20220623030405.1922980-1-neal_liu@aspeedtech.com>
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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