diff options
Diffstat (limited to 'drivers/cdrom')
| -rw-r--r-- | drivers/cdrom/cdrom.c | 71 |
1 files changed, 36 insertions, 35 deletions
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index c8ca3426c5b0..49ac5662585b 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -338,8 +338,6 @@ do { \ /* Not-exported routines. */ -static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di); - static void cdrom_sysctl_register(void); static LIST_HEAD(cdrom_list); @@ -369,6 +367,42 @@ static int cdrom_flush_cache(struct cdrom_device_info *cdi) return cdi->ops->generic_packet(cdi, &cgc); } +/* requires CD R/RW */ +static int cdrom_get_disc_info(struct cdrom_device_info *cdi, + disc_information *di) +{ + struct cdrom_device_ops *cdo = cdi->ops; + struct packet_command cgc; + int ret, buflen; + + /* set up command and get the disc info */ + init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); + cgc.cmd[0] = GPCMD_READ_DISC_INFO; + cgc.cmd[8] = cgc.buflen = 2; + cgc.quiet = 1; + + ret = cdo->generic_packet(cdi, &cgc); + if (ret) + return ret; + + /* not all drives have the same disc_info length, so requeue + * packet with the length the drive tells us it can supply + */ + buflen = be16_to_cpu(di->disc_information_length) + + sizeof(di->disc_information_length); + + if (buflen > sizeof(disc_information)) + buflen = sizeof(disc_information); + + cgc.cmd[8] = cgc.buflen = buflen; + ret = cdo->generic_packet(cdi, &cgc); + if (ret) + return ret; + + /* return actual fill size */ + return buflen; +} + /* This macro makes sure we don't have to check on cdrom_device_ops * existence in the run-time routines below. Change_capability is a * hack to have the capability flags defined const, while we can still @@ -3360,39 +3394,6 @@ int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, return -ENOSYS; } -/* requires CD R/RW */ -static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di) -{ - struct cdrom_device_ops *cdo = cdi->ops; - struct packet_command cgc; - int ret, buflen; - - /* set up command and get the disc info */ - init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); - cgc.cmd[0] = GPCMD_READ_DISC_INFO; - cgc.cmd[8] = cgc.buflen = 2; - cgc.quiet = 1; - - if ((ret = cdo->generic_packet(cdi, &cgc))) - return ret; - - /* not all drives have the same disc_info length, so requeue - * packet with the length the drive tells us it can supply - */ - buflen = be16_to_cpu(di->disc_information_length) + - sizeof(di->disc_information_length); - - if (buflen > sizeof(disc_information)) - buflen = sizeof(disc_information); - - cgc.cmd[8] = cgc.buflen = buflen; - if ((ret = cdo->generic_packet(cdi, &cgc))) - return ret; - - /* return actual fill size */ - return buflen; -} - EXPORT_SYMBOL(cdrom_get_last_written); EXPORT_SYMBOL(register_cdrom); EXPORT_SYMBOL(unregister_cdrom); |