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

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On 04/05/2011 06:45 PM, ext Michal Nazarewicz wrote:
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).

OK, I will fix this.

+ return ret;
}

Thanks for review.

--
regards,
-roger
--
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