From: Jens Axboe Date: Fri, 16 Jun 2006 05:46:37 +0000 (+0200) Subject: [PATCH] fix cdrom open X-Git-Tag: firefly_0821_release~35504 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=16070428d389ff47aa3476b0911179ad90c640a2;p=firefly-linux-kernel-4.4.55.git [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 Signed-off-by: Jens Axboe Signed-off-by: Linus Torvalds --- diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index a59876a0bfa1..3170eaa25087 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -1009,9 +1009,9 @@ int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp) 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 @@ int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp) 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;