[PATCH] fix cdrom open
Some time ago the cdrom open routine was changed so that we call the
driver's open routine before checking to see if it is read only. However,
if we discovered that a read write open was not possible and the open
flags required a writable open, we just returned -EROFS without calling
the driver's release routine. This seems to work for most cdrom drivers,
but breaks the Powerpc iSeries virtual cdrom rather badly.
This just inserts the release call in the error path to balance the call
to "->open()" done by "open_for_data()".
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index a59876a..3170eaa 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -1009,9 +1009,9 @@
if (fp->f_mode & FMODE_WRITE) {
ret = -EROFS;
if (cdrom_open_write(cdi))
- goto err;
+ goto err_release;
if (!CDROM_CAN(CDC_RAM))
- goto err;
+ goto err_release;
ret = 0;
cdi->media_written = 0;
}
@@ -1026,6 +1026,8 @@
not be mounting, but opening with O_NONBLOCK */
check_disk_change(ip->i_bdev);
return 0;
+err_release:
+ cdi->ops->release(cdi);
err:
cdi->use_count--;
return ret;