cdrom_id: Fall back to CDROM_DRIVE_STATUS if all MMC commands fail

Reportedly, some "when I'm grown up I want to be a CD drive" fake USB CD sticks
like the IronKey neither support the SCSI "GET CONFIGURATION" nor the older
(pre-MMC2) "READ DISC INFORMATION" command. In that case, check if
cd_media_compat() detected that there is a disc present, and assume that we
have a CD-ROM medium.

diff --git a/extras/cdrom_id/cdrom_id.c b/extras/cdrom_id/cdrom_id.c
index 0153af66330aeccc7be0248ca6a3656585b4274c..e7a3e40a85e22f8a2cbb3f61a649cb842df26332 100644 (file)
--- a/extras/cdrom_id/cdrom_id.c
+++ b/extras/cdrom_id/cdrom_id.c
@@ -364,8 +364,14 @@ static int cd_profiles_old_mmc(struct udev *udev, int fd)
        err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
        if ((err != 0)) {
                info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
-               info(udev, "no current profile, assuming no media\n");
-               return -1;
+               if (cd_media == 1) {
+                       info(udev, "no current profile, but disc is present; assuming CD-ROM\n");
+                       cd_media_cd_rom = 1;
+                       return 0;
+               } else {
+                       info(udev, "no current profile, assuming no media\n");
+                       return -1;
+               }
        };
 
        cd_media = 1;