The CD device on Azure VMs returns CDS_DISC_OK from CDROM_DRIVE_STATUS even
when no disc is present. In that case an ENOMEDIUM from CDROM_LAST_WRITTEN
follows. Catch that and return error to prevent probing which results in
hundreds of "unaligned transfer" warnings in the kernel logbuffer.
Signed-off-by: Jeremi Piotrowski <jpiotrowski@xxxxxxxxxxxxx>
---
libblkid/src/probe.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/libblkid/src/probe.c b/libblkid/src/probe.c
index 3685ea5e1..513649916 100644
--- a/libblkid/src/probe.c
+++ b/libblkid/src/probe.c
@@ -994,8 +994,12 @@ int blkid_probe_set_device(blkid_probe pr, int fd,
}
# ifdef CDROM_LAST_WRITTEN
- if (ioctl(fd, CDROM_LAST_WRITTEN, &last_written) == 0)
+ if (ioctl(fd, CDROM_LAST_WRITTEN, &last_written) == 0) {
pr->flags |= BLKID_FL_CDROM_DEV;
+ } else {
+ if (errno == ENOMEDIUM)
+ goto err;
+ }
# endif
if (pr->flags & BLKID_FL_CDROM_DEV) {
--
2.32.0
