diff options
Diffstat (limited to 'core/systemd/0011-cdrom_id-use-the-old-MMC-fallback.patch')
| -rw-r--r-- | core/systemd/0011-cdrom_id-use-the-old-MMC-fallback.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/core/systemd/0011-cdrom_id-use-the-old-MMC-fallback.patch b/core/systemd/0011-cdrom_id-use-the-old-MMC-fallback.patch new file mode 100644 index 000000000..793e63835 --- /dev/null +++ b/core/systemd/0011-cdrom_id-use-the-old-MMC-fallback.patch @@ -0,0 +1,54 @@ +From a14f14976094650e17d39f3a7d15a1c68c93c333 Mon Sep 17 00:00:00 2001 +From: Lukas Nykryn <lnykryn@redhat.com> +Date: Thu, 27 Feb 2014 11:06:37 +0100 +Subject: [PATCH] cdrom_id: use the old MMC fallback + +https://bugzilla.redhat.com/show_bug.cgi?id=1038015 +The problem seems to be that the your virtual DVD is emulating a really +old DVD device, and doing it kind of strangely. + +> dracut:# /lib/udev/cdrom_id --debug /dev/sr0 +> probing: '/dev/sr0' +> INQUIRY: [IMM ][Virtual CD/DVD ][0316] +> GET CONFIGURATION failed with SK=5h/ASC=24h/ACQ=00h + +So your virtual drive rejects the GET CONFIGURATION command as illegal. + +Other pre-MMC2 drives that don't accept this command usually return the +error +SK=5h,ASC=20h (invalid/unsupported command code), in which case cdrom_id +tries an older method, and then ID_CDROM_MEDIA_TRACK_COUNT_DATA gets set +and all the /dev/disk/by-label (etc) links get set up. + +The virtual drive returns the error SK=5h,ASC=24h (invalid field in +Command Descriptor Block), which cdrom_id doesn't handle, so it gives up +and the links never get made. + +The ideal solution would be to make the IMM to emulate a device that's +less than 15 years old, but I'm not going to hold my breath waiting for +that. + +So probably cdrom_id should also use the old MMC fallback when the error +is SK=5h,ASC=24h, and then all of this would work as expected. + +Suggested-by:Luca Miccini <lmiccini@redhat.com> +--- + src/udev/cdrom_id/cdrom_id.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/src/udev/cdrom_id/cdrom_id.c b/src/udev/cdrom_id/cdrom_id.c +index 93467c2..33b2bc3 100644 +--- a/src/udev/cdrom_id/cdrom_id.c ++++ b/src/udev/cdrom_id/cdrom_id.c +@@ -556,7 +556,7 @@ static int cd_profiles(struct udev *udev, int fd) + if ((err != 0)) { + info_scsi_cmd_err(udev, "GET CONFIGURATION", err); + /* handle pre-MMC2 drives which do not support GET CONFIGURATION */ +- if (SK(err) == 0x5 && ASC(err) == 0x20) { ++ if (SK(err) == 0x5 && (ASC(err) == 0x20 || ASC(err) == 0x24)) { + log_debug("drive is pre-MMC2 and does not support 46h get configuration command"); + log_debug("trying to work around the problem"); + ret = cd_profiles_old_mmc(udev, fd); +-- +1.9.0 + |