cdrom: cleanup hardcoded error-code

This patch eliminates hardcoded return value of register_cdrom().

It also changes the return value to -EINVAL.
It is more appropriate than -2 (-ENOENT) because it is only
happen invalid usage of register_cdrom() by broken cdrom driver.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 82c7d21..fbcf4b3 100644 (file)
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -393,7 +393,7 @@ int register_cdrom(struct cdrom_device_info *cdi)
        cdinfo(CD_OPEN, "entering register_cdrom\n"); 
 
        if (cdo->open == NULL || cdo->release == NULL)
-               return -2;
+               return -EINVAL;
        if (!banner_printed) {
                printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
                banner_printed = 1;