diff options
| author | Diego Elio Pettenò <flameeyes@flameeyes.com> | 2019-11-19 21:37:08 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-04 13:34:36 +0100 |
| commit | e53915bcd2bde5e86f896e47287be485ca4acebb (patch) | |
| tree | 306f65dbc4fce4d21316bdeb48ec6af7756df6a4 /drivers/cdrom | |
| parent | 5f9d7ba584a152f56e90821272f51ea32cfa3c65 (diff) | |
cdrom: respect device capabilities during opening action
[ Upstream commit 366ba7c71ef77c08d06b18ad61b26e2df7352338 ]
Reading the TOC only works if the device can play audio, otherwise
these commands fail (and possibly bring the device to an unhealthy
state.)
Similarly, cdrom_mmc3_profile() should only be called if the device
supports generic packet commands.
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-kernel@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/cdrom')
| -rw-r--r-- | drivers/cdrom/cdrom.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index aee23092f50e..2c5feb6b4a99 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -998,6 +998,12 @@ static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks) tracks->xa = 0; tracks->error = 0; cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); + + if (!CDROM_CAN(CDC_PLAY_AUDIO)) { + tracks->error = CDS_NO_INFO; + return; + } + /* Grab the TOC header so we can see how many tracks there are */ ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); if (ret) { @@ -1164,7 +1170,8 @@ int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, ret = open_for_data(cdi); if (ret) goto err; - cdrom_mmc3_profile(cdi); + if (CDROM_CAN(CDC_GENERIC_PACKET)) + cdrom_mmc3_profile(cdi); if (mode & FMODE_WRITE) { ret = -EROFS; if (cdrom_open_write(cdi)) @@ -2863,6 +2870,9 @@ int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) it doesn't give enough information or fails. then we return the toc contents. */ use_toc: + if (!CDROM_CAN(CDC_PLAY_AUDIO)) + return -ENOSYS; + toc.cdte_format = CDROM_MSF; toc.cdte_track = CDROM_LEADOUT; if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) |