Re: [PATCH v3 2/3] usb: gadget: file_storage: Make CD-ROM emulation work with Mac OS-X

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On Tue, 05 Apr 2011 16:59:28 +0200, Roger Quadros <roger.quadros@xxxxxxxxx> wrote:
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -1703,18 +1705,21 @@ static int do_read_toc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
 		return -EINVAL;
 	}
-	memset(buf, 0, 20);
-	buf[1] = (20-2);		/* TOC data length */
-	buf[2] = 1;			/* First track number */
-	buf[3] = 1;			/* Last track number */
-	buf[5] = 0x16;			/* Data track, copying allowed */
-	buf[6] = 0x01;			/* Only track is number 1 */
-	store_cdrom_address(&buf[8], msf, 0);
+	format = fsg->cmnd[2] & 0xf;
+	/*
+	 * Check if CDB is old style SFF-8020i
+	 * i.e. format is in 2 MSBs of byte 9
+	 * Mac OS-X host sends us this.
+	 */
+	if (format == 0)
+		format = (fsg->cmnd[9] >> 6) & 0x3;
-	buf[13] = 0x16;			/* Lead-out track is data */
-	buf[14] = 0xAA;			/* Lead-out track number */
-	store_cdrom_address(&buf[16], msf, curlun->num_sectors);
-	return 20;
+	ret = fsg_get_toc(curlun, msf, format, buf);
+	if (ret < 0) {
+		curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+		return -EINVAL;
+	}

I'd drop the âreturn -EINVAL;â and let âreturn ret;â below handle it.
This obviously also apply to patch to f_mass_storage.c (BTW. I would
merge the two patches).

+	return ret;
 }

--
Best regards,                                         _     _
.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michal "mina86" Nazarewicz    (o o)
ooo +-----<email/xmpp: mnazarewicz@xxxxxxxxxx>-----ooO--(_)--Ooo--
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